Veterinary Formula Anti-Allergen Mousse for Cats reduces dander and controls shedding - no water needed. Anti-Allergen Mousse is an effective aid in reducing the pet dander and loose hair that produces allergic reactions in people. Anti-Allergen Mousse requires no water for application and no rinsing, so it's a quick, no-mess way to groom pets and reduce allergic reactions in people who live with them. Gentle mousse reduces allergy-causing dander, controls shedding and there is no rinsing required. Makes mounds of mousse. For dogs, puppies, cats and kittens.