"I had a stray cat that I took in with 4 kittens along with them I took in a bunch of fleas there is no other product to use on 4 week old kittens so I bought this product and shampoo by the same makers i washed one of the kittens in shampoo and then sprayed here and combed her after about 50 fleas died in the water the next day she was flea free i would 100 % recommend this product to anyone with kittens."