ALWAYS FOLLOW PRODUCT DIRECTIONS!
Under no circumstances should you try to save money by using flea control products for dogs on your cat. Cats are more sensitive than dogs to some insecticides, and using flea control products improperly can kill them. If you’re getting a product at the vet’s office to use on other cats at home, let your vet know if some of them are kittens. Products for adult cats may be too strong for them.