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Amazon.com : Seresto Flea and Tick Collar for Dogs, 8-Month Flea and Tick Collar for Large Dogs (Over 18 Pounds), 1 Pack : Pet Flea And Tick Collars : Pet Supplies
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Amazon.com: Seresto Flea and Tick Collar for Dogs, 8-Month Flea and Tick Collar for Small Dogs (Up to 18 Pounds), 1 Pack
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