If your cat is constantly chewing and scratching its fur and skin then there is a good chance it has fleas. As a pet parent, it's up to you to detect the fleas and take necessary action. 4 Month Advantage II Flea Control for Small Cat by Bayer is the perfect flea control product for the job. By attacking adult fleas, larvae, and eggs it destroys fleas at its every life stage. This 3-way attack approach helps control the infestation fast and eliminates the chances of future infestations. Like its name suggests, this pack contains enough dosage to protect your cat against fleas for 4 months. 4 Month Advantage II Flea Control for Small Cat has a waterproof formulation, which allows your cat to roam free and be around water without affecting the efficacy. Before applying the product please take the time to read the full precautionary statement and application information.