OTC flea and tick meds 1) don't work due to oversaturation, and 2) will likely cause severe - sometimes irreparable - harm to your pet.
And cats are especially sensitive.
Pyrethrin is TOXIC to cats. And crap companies like Hertz use it in EVERYTHING.
Talk. To. Your. Vet!
Vets advise ban on over the counter flea treatment for pets
Basically, don't use these things unless advised to by a vet. They are toxic.
Andi Kennedy: Art & Words
Pet owners have historically been advised they should treat cats and dogs as a preventative measure every month.
