BAYER K9 ADVANTAGE II FLEA TRT DOGS 21-55LB 4PK
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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.