Seresto Flea & Tick Collar for Large Dogs

Give your dog long-lasting protection against fleas and ticks with the number-one vet-recommended flea and tick collar. Seresto collars kill and repel fleas and ticks for 8 continuous months, working through contact so pests don't have to bite your dog to die. Existing fleas die within 24 hours of application, and new fleas are killed within 2 hours. Tick prevention starts at 48 hours, with new ticks repelled and/or killed in as little as 6 hours. Effective against deer ticks, American dog ticks, brown dog ticks, and Lone Star ticks, as well as chewing lice for 8 months. This odorless, non-greasy, and water-resistant collar is suitable for dogs over 18 pounds and at least 7 weeks old. It remains effective after bathing, swimming, or exposure to rain or sunlight, though monthly bathing may reduce effectiveness duration.