Now your pets will always live healthy with this 6-Count package of Capstar Cats and Dogs Flea Treatment. This Capstar is Approved by the FDA. It works on pets that weight under 25 lbs, and it comes in an easy-to-swallow tablet form. This Capstar Petsmart treatment goes to work immediately and helps rid cats and dogs of infestations. Capstar Flea Treatment For Dogs & Cats: For treatment of flea infestations on dogs and cats. For oral use. Flea infestation treatment approved by FDA. For dogs and cats 2-25 lbs.