The Seresto Large Dog flea and tick collar offers up to 8 months of continuous protection by killing and repelling fleas and ticks on contact. Recommended by veterinarians and trusted by pet owners, it eliminates fleas within 24 hours and repels ticks within 48 hours of application. The collar protects against common pests like deer ticks, American dog ticks, and chewing lice, and helps prevent diseases such as Lyme disease and bartonellosis. ItÂ’s odorless, non-greasy, water-resistant, and suitable for dogs 7 weeks and older, with no prescription required
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