Advantage Multi is a prescription, once-a-month topical solution for broad-spectrum parasite protection in cats and ferrets. This cat flea treatment kills adult fleas on contact (no biting required) and helps prevent flea allergy dermatitis (FAD). For cats 8 weeks and older, it provides heartworm prevention, ear mite treatment, and intestinal worm control (roundworms and hookworms). For ferrets (≥ 2 lb), it offers heartworm prevention and eliminates adult fleas. Easy topical application with no pills makes monthly flea prevention for cats and ferrets simple and convenient.