BAYER K9 ADVANTAGE II FLEA TRT DOGS 21-55LB 4PK
Advantage II kills fleas at all life stages. Fleas are killed within 12 hours, and to protect against further infestations, reinfesting fleas are killed within 2 hours. Advantage II works through contact, so fleas don’t have to bite to die. One convenient waterproof application of Advantage II lasts for one month. Formulated to treat dogs weighing 21-55 lbs. Contains four monthly treatments.