Elanco, a sub-division of Eli Lilly, has announced a new flea product for cats called Assurity. I’ve already covered Evolve11 by Sergeant’s and discussed whether “new” means “safer” for pets and their people, especially toddlers. Let’s take a look at Assurity.

To understand where Assurity came from, we have take a little look at history. First, spinosad (the first spinosyn product) is an ingredient in the dog flea product that comes in pill form called Comfortis. One of the boons of Comfortis is that it comes in pill form so it does not allow the active ingredient residues in your home or for toddlers to come into contact with it. GreenPaws, which a site run by the Natural Resources Defense Council (NRDC), lists some common ingredients and rates them on toxicology, especially harm to humans. They give Comfortis one out of three paws for toxicity, which is a pretty good rating compared to other products.

In 1982, a vacationing scientist took soil samples from an abandoned rum distillery on a Caribbean Island. He found a naturally occurring soil baterium called Saccharopolyspora spinosa.  Apparently it is quite rare and has not been found elsewhere. In 1988, it was fermented for use as a biological pest control product similar to an insecticide. Spinosad works by over-exciting the insect’s nervous system, but it must be ingested. That means fleas, ticks, mosquitoes or whatever pest it is targeting, needs to bite and take in the spinosad. The claim is that since it must be taken in orally by the insects that it poses little risk to humans. It also means that with Comfortis, your dog has spinosad in their blood stream for quite a while. Because it is “natural” it is approved for use on organic crops as a pesticide much like pyrethrin is.

It makes sense, then, that there may be issues with topical use of spinosad and humans, especially toddlers. A new approval has just been given to the lice treatment, Natroba. (By the way, apparently slathering the head with vaseline and putting saran wrap tightly over the skull also kills lice.)

It is especially important to avoid treating patients 6 months and younger with spinosad, since it contains benzyl alcohol, which may cause serious adverse reactions — including death — in those patients, the FDA cautioned in a statement.

Benzyl alcohol is a wicked ingredient despite also being considered “organic”. It is a solvent for inks, paints, lacquers and epoxy resins. You can even use it as a photo developer. It is also included in many flea and tick spot on products. It poses a hidden danger, as one owner learned when his dog was treated with Advantage and his dog ended up stuck to the bottom of his crate due to benzyl alcohol in the product. Bayer, another member of Big Pharma (and also a manufacturer of agricultural pesticides) makes Advantage. Bayer also discovered an marketed propoxur, now the focus of an NRDC petition to the EPA, to attempt to remove this harmful ingredient, a known neurotoxin and carcinogen, from flea & tick collars.

Assurity for Cats is a topical product and contains spinetoram, similar to spinosad, but partially synthetic. It’s the first companion animal flea treatment to include this ingredient and, for marketing reasons, will only be sold through a vet. It  contains very high amounts of benzyl alcohol. Here is the patent info.

Such optional ingredients can be, for instance: benzyl alcohol, from 30-65%, and more normally 45-60%, by weight

Benzyl alcohol is one of those chemicals that cats have a very difficult time eliminating and so it becomes toxic to them very rapidly.

… benzoates have caused many fatal toxicities in cats…

Despite having a meeting with the EPA regarding spinetoram, most of my questions went unanswered. There is simply little public information available for spinetoram used as a pet product. However, it was confirmed that companion animal safety studies were performed on cats and using the entire formulary (which is rare in EPA procedures – usually only separate active ingredients are tested). However, those studies do not seem to been released publically yet. James TerBush, of BiospotVictims.org, has put in a Freedom of Information Request for cat specific studies, including home environment studies with toxicity to toddlers. Thanks to James & dedicated people like him, there is more information available than ever before about these products.

Dow Chemical has received awards from Green Chemistry Award and the EPA for finding “safer alternatives” with spinosad and spinetoram, primarily for crop use, but using it on cats as a topical seems reckless for the cats and especially the people living with their companion animals.

“The speed with which we received our first registration is creating a lot of excitement in the marketplace over this new generation of pest control,” says Don Kelley, global product manager, insecticides, for Dow AgroSciences

Speed is usually not the best measure of safety. Safety studies take at least 2 years to complete for each use type. When a pesticide is given conditional registration, they often are given the okay to market untested or not thoroughly tested products before submitting such tests. The conditional portion is supposed to be “okay, you can do this, but within the next two years we need you to submit the studies and back up your word that this is safe”. Sadly, once a chemical is on the market, it becomes difficult to remove it. To my layman’s eyes, it looks like studies for spinosad were used for spinetoram since they are similar in chemical structure. I have found references to this with the World Health Organization, Health Canada and the EPA. Since I don’t work for the government it’s difficult to know for sure what this means to the pet owner.

The EPA has not given much information on spinetoram to the public yet, so without all the information it is difficult, if not impossible, to make an educated assessment of the product. New pesticides are supposed to be posted on Regulations.gov and be open for comment. The docket for spinetoram that I found does not seem to address use on animals and is dated. It only has 8 entries. However, the old “trade secret” trick might be why these studies are lacking in the docket.

Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (CBI) or other information whose disclosure is restricted by statute.

This patent, also filed by Eli Lilly, only seems to have been tested on dogs. However, Health Canada, the Canadian version of the EPA in the United States seems to have released more information. Still, it appears to have been tested on almost everything except cats.

What concerns me most about the release of the Health Canada information is (my emphasis added):

Several metabolites were isolated, identified and characterized from urine and feces of rats treated with radiolabelled spinetoram. Spinetoram was almost completely metabolized by glutathione conjugation of the XDE-175-J parent compound, as well as glutathione conjugation with N-demethylated, O-deethylated and hydroxylated forms of the XDE-175-J parent compound, in conjunction with glutathione conjugation of the XDE-175-L parent compound, as well as glutathione conjugation with N-demethylated and O-deethylated forms of the XDE-175-L parent compound.

This may seem like a bunch of scientific gobbly-gook, but in relation to cats and their ability to metabolize spinetoram, it is significant. Glutathione is in every cell of a mammal body and is considered to be the most powerful antioxidant known to humankind. When your body becomes diseased, run down, traumatized and as you age, your stores of glutathione also deplete, causing chronic illnesses. In cats, their stores of glutathione are rapidly decreased, which is one reason why cats have more difficulty than most mammals in eliminating most essential oils, many chemicals and pesticides. In fact, glutathione is given to cats suffering from acetaminophen (the ingredient in Tylenol) toxicity as a treatment to help eliminate the acetaminophen from the body. (My emphasis added)

… metabolized with glutathione to nontoxic mercapturic acid (which is eliminated). If the toxic metabolites accumulate as a result of insufficient glucuronide or sulfate metabolism or insufficient glutathione, they are converted to toxic macromolecules that directly cause cellular death. Cats lack glucuronyl transferase and inefficiently form glucuronic acid and sulfate conjugates, leaving more acetaminophen or phenacetin to be metabolized to toxic metabolites. The glutathione stores are rapidly depleted in cats, leaving a large amount of toxic metabolites. Methemoglobinernia occurs.

Due to the extreme sensitivity of the cat to many things easily metabolized by other mammals, toxicity information for any other species does not necessarily mean that the same product or chemical is safe for a cat. This was an issue that we discussed in our August 2010 meeting with directors at the EPA.

As with so many “new” products, both synthetic and “natural”, designed to fight fleas & ticks, I am more than a little cautious and wary of Assurity and it’s long term safety for cats. Also, since it is a spot-on product, households that have children under the age of 6 should be incredibly careful. Toddlers are most susceptible to chemicals that effect their nervous and endocrine system and are at the highest risk of exposure (other than your pet) for topical flea control products. They often crawl on the ground, put things in their mouth they aren’t supposed to, pet or cuddle a household pet and then put fingers into their mouths.

Please see my list of alternatives. I research diligently and often ask manufacturers for more information. If I get double speak (which happens often, especially with “natural” products) or no answer after several attempts to contact the manufacturers, I do not recommend the use. At the best, it shows the company does not understand their product enough to explain it and at worst it shows they are not willing to go on record with ingredient, health or toxicity information. Pesticides should only be used IF you have an outbreak and WHEN all other methods have failed.

MORE RESOURCES:

California Department of Pesticide Registration: Public Report

Wikipedia Eli Lilly History

Assurity 4 Cats Website (please download the label info and read it carefully)

This is an interesting site as well, as they have keeping a watch on Bayer for 30 years.

Special Thanks go to James TerBush whose tireless researching and willingness to share his knowledge are phenomenal. If you haven’t do so yet, check out BioSpotVictims.org and look through the archives. It’s well worth it!

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  • hamishdad<span class="comment-author-location"> from Douglassville, PA, United States</span>

    Simply outstanding, Tiny Timmy. Thank you for posting this important information for pet owners!

  • Marjorie & Dash<span class="comment-author-location"> from Wellington, Wellington, New Zealand</span>

    Thanks for this Timmy. There is a lot of science isn’t there – something that might put off ordinary pet owners. You are the best at interpreting things for us all.

    • There is a lot of science, and that’s what companies hope will keep pet owners in the dark. The long and short is, the best message to take away, is that you have to do your own safety research and only use pesticides on your pets when/if they have an outbreak and when/if everything else has failed. It’s serious stuff and the fact that they are almost everywhere makes them seem much safer than they are!

  • Pingback: Tweets that mention Elanco's new cat flea product: Assurity. Is it safe? | Tiny Timmy's Healing Journey -- Topsy.com from San Francisco, CA, United States()

  • Gosh, I’ve been looking about this specific topic for about an hour, glad i found it in your website!

  • Fearghais

    Thanks for such a great article. I used Assurity on my cat yesterday and today I noticed a spot about 2 inches long and about and inch wide, right where I applied the topical solution, that is now bald.

  • Angie21837

    Thank you very much for your work. My vet pushed this product on us as a safe and natural pesticide now used by humans on fruit and vegetables. Having heard nothing of this product before hand, I took his word. I applied it to all four of my cats, two of which were all ready in the grips of a newly developed flea allergy. I noticed as soon as it was applied that the cats seemed uncomfortable, they wanted to roll around to get it off (the benzyl alcohol, I assume). The next morning (this was applied pretty late at night) three of the four cats had bare spots where the Assurity was applied.

    Nearly four days later, one cat has a scab on the bare spot and all four are still itching as if thus had no effect on the fleas. I paid $60 for all four cats to be treated and now I find out my cats could die from this since there is so much benzyl alcohol in it. I am afraid for my smallest cat since she is all ready pretty frail.

    The vet and Assurity will be getting a piece of my mind tomorrow. The vet will also be receiving an education.

    Thanks again for all your work, your site will be passed on.

    • Hi Angie – Interestingly, Elanco is riding on the back of Comfortis, which is similar, but a pill and for dogs only. I have the EPA studies and it appears that there is some issue with studies having been approved as well. I am working on a way to put all the studies up here so everyone can search for what they need in one place. My own vet, a holistic vet, researched Assurity after a rep came by to tell him it was “totally safe” for cats. The best info he found he said was this site. He is Timmy’s acupuncturist as well, so it was interesting feedback.

    • Also Angie – Bathe your cats as soon as you can in Dawn Blue dish soap. This should get rid of anything still left on the skin. I have a page on how to report these things (so the EPA can keep a pulse on the worst of these products) under Fleas>Reporting as well as directions on what to do once your pet has been exposed and had a bad reaction. Also, make sure they have extra water. That might mean putting water in some wet food for them.

    • Jrm1835

      Angie21837! The same happened to me. I just put Assurity on my three cats. Two are doing fine, but one keeps scratching and itching. Did you try to wash it off? Not sure what to do. I, too, will be giving my vet a piece of my mind!

      • Anonymous

        Hi Jrm – You should wash your pet immediately in Dawn Blue Dish Soap (regular not antibacterial). You can find out what to do from there on by going to the “fleas” menu. It has how to report & what to do.

    • Anonymous

      Same with my two cats!

  • Pitboss34

    Yikes! I treated five of my six cats with assurity yesterday and four of the five are showing hair loss in the treated area, One of the five has a big bald spot. I called assurity and their vet explained that the side effects of this treatment include hair loss. They told me they would refund my vet but money is the least of my concerns. Don’t use this product!!!  

  • Ben Hollis

    We treated our American Bobtail with Assurity for fleas and within several hours a large  patch of hair fell out.  Surely there must be flea treatments that are safe to use.  I will NOT use this product again.  As for the vet,, most likely, she has lost a customer.  This product should be taken off the market.

    Crazy Horse 

  • Bremtay

    our vet called us and ask us to return the unused assurity we had left and get a full refund. everyone he called had problems with hair loss where it was applied

    • Anonymous

      Good on your vet for following up with his customers. This was an issue with almost every animal in the cat studies, however there were even more adverse effects that resulted in serious damage and death in the studies. Thanks for sharing your experience and following up to let us know about the diligence of your vet!

  • Martor1

    We tried assurity on one of our cats and it burned his skin so bad that his fur fell off at the point of contact on the back of his neck. He also had welts along the area. The solution clumped up and kind of crystallized where we put it on. The only thing we could do was wipe it off with a wet cloth and contact our vet. We’ll never used that stuff again. 

    • Anonymous

      I am so sorry to hear this! If you look at the rest of the comments, it doesn’t seem to be a rare reaction. How is your cat doing now?

  • mittopud

    i had the exact same experience with my cat.  the day after i put on a dose of assurity (yes, baldness is a sure side effect), patches of black fur were falling off his neck, and he was QUITE agitated.  i washed it off with soap immediately.  now, he has a bald spot on the back of his neck.  my vet said she went to a vet-only website to check up on the product and found absolutely no comments about this side effect.  she needs to see this website.  this product is suspect and needs to have a giant warning on the package about this apparently very common side effect.

    • Anonymous

      From what I have heard from several vets, the reps are going around saying how safe it is. I have the studies & so many cats died in the studies it’s a wonder they got it approved. No clue how it happened, but now it’s here. My own vet, when he googled Assurity to research it before carrying it, ended up here too! I have a feeling that this is going to be a huge hotbed of controversy in the coming months/years.

    • Anonymous

      PS – If your vet would like to see the actual studies, I would be more than happy to share them. A friend who runs another site similar to this had to get them through a Freedom of Information Act Request.

  • Jennifer_baby

    I put this product on my 1 yr old 10lb full of fur cat…he is now losing PATCHES of hair! his fur has thinned out so much because of this product!

  • Atbigfoot91

    My vet applied this medication to my Himalayan and the next day I noticed his hair was dying and falling out on the application site. He seems to be qlright, otherwise. I took him back to the vet and they did NOTHING to help him. All I can say is that there are people out there that better hope and pray for my cat’s health – and their own.

    • Anonymous

      I am so sorry you had this experience. I wish the best to you and your beautiful kitty. Please keep me posted & be sure to go to the FLEA tab here and choose the REPORTING menu. Make sure that it gets documented with the manufacturer and that they give you a claim number. Then report it as well to the EPA directly. It’s important. The EPA can’t halt this horrible product unless they know what is going on and the only way to make sure your case is received by them is to do it this way.

  • Squirts Mom

    THIS IS NOT SAFE!!!  I’m so disappointed in myself for NOT doing research.  I just moved to this area and I was so confident in my last vet that I forgot not everyone does research.  This vet said she ONLY will use Assurity.  My 11 year old cat has used Advantage (I think), Frontline, and Revolution in the past and NEVER had an issue!!  This Assurity BURNED her skin!!  Her hair was burned off and her skin is burned! 

    • Anonymous

      Hi Squirts Mom – I am so sorry to hear this. Assurity is really doing a good job of pitching their product (falsely) to vets. I have heard some of the sales pitches. I have a copy of the studies if you want to read them. They had to stop studies on cats & kittens because too many died. This should NEVER have gotten onto the market! Please be sure to go to the “Fleas” and “Reporting” tab. YOu can call the Pet Poison Hotline (on the sidebar) and report your case to them so it gets logged with the EPA. You can also call the EPA and report it there.

  • Borage2u

    I’m so glad I found this site.  Went on assurity page…no info!!  Where’s the pro’s & con’s?  My 12 yr old cat has lost her hair & just is not herself. (used assurity)  Thank you so much for your web site plus thanks for being an animal lover.   Gayle

  • KigerTiger

    Hi Tiny Timmy, 

    I wish I had seen this article sooner. My cousin is a Vet Tech and the vet she works for gave her Assurity for her cats. She said she uses it and wouldn’t steer me wrong. But I put it my 6 month old kitten about an hour ago and she freaked! I don’t know if she’s ever had a flea treatment before, but she started running around and freaking out. Somehow (very flexible cat) she managed to whip her head around several times and LICK THE STUFF! I was so scared I’ve been searching for info on it since I applied it. She ran around and vocalized in several bursts, but has since calmed down and gone to sleep. Now I think I should go wash it off! This is terrible! I’m giving it back to my cousin and telling her to get me something else. Forget this! Thank you for all your research. You may have saved many cats by doing this. 

  • Dr. Golden DVM

    All topical flea products have the potenial for hairloss. Some more than others.

    • Anonymous

      Hi Doctor Golden! Thanks for coming by! The reports that I have been getting about Assurity are much much higher than other products and include chemical burns much of the time. Currently the EPA is doing a data call in so hopefully if there is an uncommonly high number of adverse reactions it can be remedied. I have a copy of the cat & kitten studies on the formularies if you want them. Both had to be cancelled due to the uncommonly high number of cat/kitten deaths. The carrier is a large part of that according to the study. They lowered the carrier a little, but it was never re-tested. That is the biggest issue with Assurity. That, and as you know, Comfortis which is spinosad for dogs is harmful for cats. Assurity is a “semi-synthesized” version of that in spot-on form.

  • J@ssfl

    Worked for our cat perfectly…she has severe flea allergies and it eliminated other medications we were dosing her with to get rid of the constant itch and scabby results. When using a product you DO need to read the instructions carefully and if you have small children and other animals then surely you should take all of those things into consideration when picking a product. When it says the area will have a “tarry” feel at point of application and to “leave it alone” it will dry up and turn to a dust……it does just that.  Maybe it doesn’t work for your pet, then don’t buy it others may have seen positive results. Over reacting doesn’t help either, use your common sense !!

    • Anonymous

      Common sense is good! What is also good is having product on ths market that’s able to pass on toxicology tests.

      The testing for both cats & kittens was shut down (very rare) due to too many deaths in the study groups. Despite this it was rushed to market as a safer alternative.

      Despite EPA “transparency ” these studies had to be received via a Freedom of Information Act Request. If you would like a copy I would be more than happy to provide it. Just email me.

      Sadly as a general rule you & even vets sometimes are not given the opportunity to make educated decisions on animal care due to poor labels & with held information.

  • PJ

    I salute you for doing all the work required to provide us with this valuable info. I watched helplessly while my beloved cat died a horrific death (from inhaling DE!), and another recently had a seizure after treatment with Frontline; therefore, I’m extremely grateful to have read this before trying Assurity.

  • Nikki_wells

    I also tried assurity for my 7lb 2year old cat and she freaked out! i was using frontline but it seemed to stop working so i asked my vet for something else and she gave me assurity. i put it on my cat and she immediately  started acting weird! Her skin was “crawling:, she was scratching at it, clawing at it, she tried desperately to lick it off and i think she even ingested a little bit of it! so i got online and found this site and quickly gave her a bath to get it off. she calmed down after the bath but the next morning she had a giant bald spot at the application site! im glad i found this site when i did, Thank you for caring! 

  • Charley

    My cat has a bald spot where I applied the Assurity a few days ago.  He was resistant when I tried to apply it; therefore, it got spread out a little instead of one spot.  He seemed rather lethargic after I applied it.   Does anyone know if the hair ever grows back?  This is really sad.

  • Charley

    Just heard back from Elanco.  They said it would take about 21 to 28 days for the hair to grow back.  They have gotten lots of complaints, but we were told that it happened more on the second dose.  I won’t be using it again on my Mister Boots.

  • Janlamothe

    I recently purchased three Assurity from my vet for my three cats. Not only did they become violently sick, vomiting excessivly but they all lost the hair at the application site. Please do not use Assurity on your cats.

  • Jennifer

    Our vet recommends Comfortis  for cats, which we have been using when we see fleas. It has worked well, no visible reactions. We have 3 cats-one long hair, 2 short.  We decided to try Comfortis because the Advantage doesnt work anymore on fleas in Hawaii- many people were complaining of this to the vet.  He uses it on his own cat, so I have been using it for about a year- same weight for dogs as for cats- ie my 10 lb cat gets the dose recommended for a 10 lb dog.  I am not advising you to do this.  I am only reporting what is being tried here.

  • Sharoneast

    Advantage stopped working and Assurity burned my cats and caused hair loss.  Bugs are a problem here in Florida.  I need something that works, but doesn’t hurt my cats.

    • Luci

      I am in the same boat here in Florida. Advantage multi stopped working on my cats. Two of them have scabs and hair loss all over. I can’t bathe one of them because she goes nuts if  a person even tries to handle her. It is super expensive to hire pest control for house and yard all the time. I have tried everything which is why I was looking into this product now seeming to be more harmful than helpful to cats. Am so at a loss.

      • TinyTimmy<span class="comment-author-location"> from Portland, OR, United States</span>

        Please check the Alternatives page. You can treat your home and yard with DE (there is even a company that will come and do it with borax and DE if you prefer someone else to do it). That will go a long way to controlling the issue outside. All the pesticides are not working well because fleas are building super-immunity from our over use. Please be careful of “eco” pest companies that use pyrethrin, which they claim is all natural and totally safe. It isn’t. Especially for cats.

  • Johnnola504

    I put Assurity on both my cats 4 days ago. Both now have bald spots on the application spot. Chunks of hair all over my house. And the Assurity never really disappeared , like Advantix did after 2 days. My vet steered me from Advantix , wonder if there is a higher proffit margin on Assurity. If something works, why convince me to use something else??? I trust my vet also. Will wash off tomorrow and call my vet, and I want my money back! There are comments all over the Internet about his reaction.

  • Eileen Sigler<span class="comment-author-location"> from Vista, CA, United States</span>

    Beware – Do NOT Assurity flea product!  I treated my cat with it for the first time and the same day, he experienced complete hair loss about 3/4″ across at the treatment site. The hair around the treatment site – that didn’t fall out – is spikey and sharp from the medication. I am wondering if I should cut it off or shave it.

    I called Elanco and they didn’t seem too concerned about this complaint but I have never had this happen to any of my dogs or cats using Frontline, Advantage or any other flea product.

    Not worth it, stick with a more prominent known product on the market!

  • Marsha1928<span class="comment-author-location"> from Orlando, FL, United States</span>

    Our kitty is 17 years old. She went in for an abscessed tooth. While there our vet told us about Assurity. We waited until two weeks after her surgery and dental cleaning. She was doing fine for about a week or so. No loss of hair at all. But now she is on her death bed. It started with her not being able to jump up to her bed.

    This past weekend she progressed to the point that by last night she could no linger walk! We took her into our vet today. The very bad adverse effects of Assurity were in her vet book. My cat has them.
    I called the makers of Assurity. Do not bother to call them. Their vet got on the phone and did nothing but talk in circles and tried to blame the issue on us and her. I hung up the phone of their vet since she would not respond to my question. The only thing she did was call back and is payng for the initial vet bill. Nothing else!

    It is truly a waste of time trying to get answers from them..
    By the way, our vet was shocked when she read the adverse

    effects of this product.

    • TinyTimmy<span class="comment-author-location"> from Portland, OR, United States</span>

      Hi Marsha – So incredibly sorry to hear about your cat! Please keep me posted. Assurity is a pet peeve of mine because of the way it was approved and the way the reps marketed it to vets with false and illegal statements. My own vet did research and ended up here as well. Please be sure to report the reaction by using the “If Your Pet is Having a Reaction” link on the top of the right side menu bar. It is the only way that the EPA can keep track of what is going on in the real world.

    • Alice<span class="comment-author-location"> from Boise, ID, United States</span>

      I think your vet should have know the adverse effects before prescribing.

      • TinyTimmy<span class="comment-author-location"> from Portland, OR, United States</span>

        Alice – the problem is the reps are going around to the vets and saying it is the only “natural non toxic” flea product. This is untrue. If the reps are going to say that to vets do you think they are going to give you the laundry list of problems? By law they are not required to give a full list. Not even to vets. Not even on their inserts (if they include them).

  • Margo Severini<span class="comment-author-location"> from Hollywood, FL, United States</span>

    This product killed one of my cats only a year and a half old. Loss of balance, lethargic, went blind. This stuff is pure poision. Label states from kittens 8 weeks to adult……same dose. Are you serious. I am such an idiot to not realize you cannot use the same dose on a kitten as an adult. It is just a small amout in each tube but enough to kill a full grown adult cat. Im going back to using Diatimatious Earth. That product is at least all natural and completely harmless.

    • TinyTimmy<span class="comment-author-location"> from Portland, OR, United States</span>

      I am so sorry for your loss. Your vet should have told you this about the weight/age since it is a vet only product.

  • Anneliese Salomon<span class="comment-author-location"> from Tracy, CA, United States</span>

    Okay question.. Spinosad for insecticide is claimed to be organic.. was going to use it in my veggie garden.. but worried with my outside kitty might injest it. reading that it is toxic as a flea control.. made me rethink using it.

    • TinyTimmy<span class="comment-author-location"> from Portland, OR, United States</span>

      Spinosad also comes in the form of a tablet called Comfortis. This review was for Assurity for cats which is a liquid topical application. The EPA Project Manager stated they felt the issues had to do with the carrier (the majority of the ingredients that they don’t need to tell you what they are and can often be more toxic). Spinosad was discovered in the ground at a rum plantation where there was little insect life. I have no clue for what pests you are targeting or how it is applied for organic farming, but please keep in mind when you look at a flea product, you look at the product with all of its components, not just the active ingredient. So long as your outdoor kitty isn’t around when you apply it, I would think it has a higher margin of safety for cats than pyrethrin, which is also used in organic farming but accounts for the majority of adverse reactions in flea & tick products.