Adams Plus Flea & Tick Shampoo with Precor is great for cats, kittens, dogs and puppies (12 weeks or older). Provides flea treatment, killing adult fleas and flea eggs on your dog or cat to prevent reinfestation. In addition to eliminating active infestations, the active ingredient, Precor with is an Insect Growth Regulator, controls flea infestation for up to 28 days. Kills lice on contact. | Adams Plus Flea and Tick Shampoo With Precor