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Amazon.com : Hartz Ultraguard Plus Flea & Tick Dog Collar : Pet Flea And Tick Collars : Pet Supplies
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Amazon.com : Hartz UltraGuard Flea & Tick Collar for Dogs and Puppies - 26" Neck, 7 Month Protection : Pet Flea And Tick Collars : Pet Supplies
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Hartz UltraGuard ProMax Flea & Tick Collar for Dogs & Puppies with Comfort Technology, Blue, 2 Pack - Walmart.com
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