Hartz® UltraGuard® Flea & Tick Collar for Puppies | Hartz
Seresto Flea and Tick Control Collar | for Large Dog | at Petremedies
Johnsons Veterinary Dog Flea & Tick Collar
Amazon.com : Seresto Large Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Over 18 lbs. | 8 Months Protection : Pet Flea And Tick Collars : Pet Supplies