Review on Flea & Tick Collar for Cats & Kittens: Farnam's Ultimate Defense by Lashawn Diaz

I think they work great. I bought them for my cats because I found a tick on one of them and they are indoor only cats. My guess is that my dog brought it and he jumped off the dog after sniffing the tick collar (I use a different brand for dogs). The problem I had was that they smell SUPER strongly of some serious poison. Every time I took my cat, I had a nose full of toxic chemicals. I will suffer if the need arises again, but only temporarily as I feel use is best kept to a minimum if I don't want us all inhaling toxic tick collars. But yes I'm sure they work, the smell seems to scare away any living thing.