Advantus is ideal for dog owners who want a product that effectively kills fleas fast. Dog owners simply feed the savory soft chew to their dogs. A single dose kills adult fleas on dogs, but it is safe to give daily as needed if re-infestation occurs. Advantus contains no animal proteins, so it may be suitable for dogs with animal protein (food) allergies. Available in two tablet strengths: 7.5 mg for small dogs (4 to 22 pounds) and 37.5 mg for large dogs (23 to 110 pounds).