The collar works amazingly well but the break away feature needs to be looked at because they don’t break away. My cat tried to get the collar off and got it caught in his mouth. He dang near killed himself, blood everywhere when I found him and then had a vet bill to make sure he was ok

I wish I had read these other reviews first because my cat also received a sore on his neck. After a few days of wearing it I noticed a tuft of fur missing on the back of his neck. I thought it was unrelated to the collar and it didnt look like a wound. A week later that tuft had turned into a massive sore. I am now going to have to wash it multiple times a day with salty water so it doesn't get infected. I feel terrible that I didn't check him daily for sores around his neck. I would recommend doing this if you are going to try the collar.

After a week of one of my six cats wearing its seresto collar, it’s neck became hairless with sores developing. It is a great product. I have used on 4 of my older cats for 5 years. I have 2 recently rescued and one is allergic. So make sure your cat is ok after a week. If not please don’t use.

GREED destroys, a complete rip off. Spent $100 + on collars from my veterinarian to avoid Counterfeit 2 days later 2 tics imbedded in cat’s neck effing joke submitted a claim

We have a male cat with no scruff. He adapted fine to the collar which we purchased two weeks ago. I noticed yesterday that he wasn't acting himself. He is very vocal normally telling me to feed him or pick him up. That was not the case
He just laid around all day. Today I looked to see if maybe his collar was too tight. That was not the case either. But, after examining him I noticed that he had hair loss and very red irritated skin half way around his neck. So off the collar went and into the trash!

My Poor cat has been suffering she was scratching at the collar tonight on closer inspection her skin was red and raw in parts with fur missing. Won't purchase again.

Had to cut off the collar as left red mark and sores around my cats neck. Also fur missing. I could put 2 fingers under the collar so was not too tight.

After 3-4 weeks of wearing this collar my cat began to get darker pink skin areas and lose fur. First around where the collar was then in other areas. He developed red areas around his eyes and butt as well as under him. With time most of skin turned black. Had biopsies and other tests vets are stumped for answers.

Purchased Seresto and it worked well on cat for 1 month only - not up to 8 months as loudly printed on collar tin. I am disappointed with product and have paid.

My cat was riddled with fleas (if I parted her fur on her head, I was guaranteed to see at least one flea, usually more). I tried the Advocate Flea treatment and flea shampoo (all recommended by the pet store), but to no avail.
As a last resort the pet store recommended Seresto Flea collar. Within the first week there was a noticeable difference (head part test; no fleas) and after having the collar for approximately one month, her fleas have disappeared.
However the only downfall was that we had to remove the collar yesterday as she developed a sore on her neck but it was worth the one month’s grace of not seeing my cat go crazy by scratching & biting herself every five seconds.

Works at getting rid of the fleas, easy to put on, but after a few days my cat was left with a horrible sore on his neck and hair loss. Can't tell you if it works after as i cut the collar off and took him to the vet.

I have had the collars for just over a week. The collars advertise 8 months life span. They have worked for all of two days and my cats are all riddled with fleas again. Not to mention my younger two who have white fur have sores on there necks from where the collars where sitting l, am unable to check the other two as they are tabby’s with dark fur. But have removed collars from all 4 babies. My youngest kitten went mental not long after the collar was put on. Biting and tearing her fur. Took her to the vets and they advices removing the collar. I had checked they weren’t on too tight by being able to insert two fingers comfortably under the colllars.

We bought this because the doctor from local animal hospital suggested it. After using it for a few weeks, we noticed that the cat was still scratching. We combed him and found about 60 fleas in one try. Now, we have terrible flea outbreak and our whole apartment is infected with fleas!

Awesome product. Not a flea on either of my cats (one long hair and one black short hair) and it seems to be working on ticks as I’ve even found a dead tick in their bedding. We live in a high tick area and they are starting to come out in force atm. Great peace of mind for outside cats. Works out way cheaper than spot ons.

I am extremely disappointed in the Seresto flea collars I purchased for my 5 cats. I've purchased these collars 3 times for my 5 cats and the collars do not keep the fleas away as it should. All in all, these collars DO NOT work!! They lose their efficacy very quickly.

My vet recommended this product. I have a 11 y.o. Russian Blue male. He never had fleas, but I wanted the best protection for ticks coming into the summer Sydney tick season. The product works by dispersing it’s active ingredient on the skin. The collar must be fitted to allow 2 fingers’ worth of space resting flush against the cat’s neck. Through movement the fur around the collar naturally malts off. Not seen the adverse effects to my animal others mention. Seems to be working well after 1 month from wearing it. $50’s worth of tick prevention is better than $1000 worth of tick treatment (if I got him to the vet in time).