Help your dog get rid of his fleas with Advantus Soft Chew for dogs. This over the counter oral flea treatment kills fleas within the hour. The active ingredient called Imidacloprid is an insect neurotoxin that works by paralyzing and killing fleas. This soft chew can be given straight from your hand and fed as a treat as often as once a day, or you can keep it on hand for the next flea season. Advantus Soft Chew helps you get rid of the fleas and helps you avoid the mess of topical treatments. Advantus is available on Vetito veterinary pharmacy in two sizes to meet your dog's needs: small dogs, 4 to 22 pounds (7.5mg strength) or large dogs, 23 to 110 pounds (37.5mg strength). It also comes in two quantity options: 7 or 30 soft chews. Advantus is suitable for puppies (at least 4 pounds, ages 10 weeks and up) and dogs.