Bayer has launched Advantus (imidacloprid), an FDA-approved soft chew for the treatment of flea infestations on dogs and puppies 10 weeks of age and older. It is available without a prescription. Advantus is a safe and effective soft chew for dogs that starts to kill fleas within one hour and is safe to give daily as needed. It contains no animal proteins, so it may be suitable for dogs with animal protein (food) allergies. The product will be sold through both retail outlets and veterinary clinics in small- and large-dog formulations.