Advocate (Advantage Multi) For Cats & Kittens Under 8.8lbs (4kg) Advocate Small For Cats under 8.8lbs (4kg) and prevents fleas, heartworm, gastrointestinal worms, parasite infections, lungworm, and ear mites. Advocate Spot-on for Cats is a powerful patented formula that keeps your cat purring and parasite free for no less than 12 months. This effective compound defends your favorite feline from the parasitic menaces of: Fleas Heartworms Gastrointestinal worms Ear Mites Advocate is once a month treatment. With a drop on the back of the neck, your kitty can continue his curiously cute dominion over all they survey without you having to worry about the severe health effects of a parasitic infestation. Worming treatments on cats, particularly heartworm treatment, is a critical year-long practice. You never want your cat to deal with such an easily preventable issue.