Amazon.com: SportDOG Brand FieldTrainer 425X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies
Amazon.com: PetSafe Add-A-Dog Remote Training Collar – Perfect for Small, Medium and Large Dogs – Choose from Tone, Vibration, or 15 Levels of Static Stimulation – Waterproof and Durable – Rechargeable : Pet Supplies
SportDOG Extra Collar for SD-425 or SD-825 Unit | Sporting Dog Pro
Dog Collar Receiver - Containment System Add-On - eXtreme Dog Fence
Stay & Play® Wireless Fence Receiver Collar for Stubborn Dogs by PetSafe - PIF00-13672
Premier Pet Wireless Add-A-Dog: Adds Unlimited Dogs to Premier Pet Wireless Fence, Additional or Replacement Collar, Adjustable, Waterproof, Tone & Static Correction, Low Battery Indicator - Walmart.com
Amazon.com: SportDOG Brand FieldTrainer 425X/SportHunter 825 Add-A-Dog Collar-Additional, Replacement or Extra Collar for Your Remote Trainer-Waterproof and Rechargeable with Tone, Vibration and Static : Pet Supplies
Amazon.com: Premier Pet Wireless Fence Add-a-dog Collar GIF00-16348
Premier Pet In-ground Adjustable Add-a-dog Collar - Black : Target
Remote Trainer Add-A-Dog® Collar - Free Spirit Pet Products
PREMIER PET-IN-GROUND ADD-A-DOG-WATERPROOF/RECEIVER NYLON COLLAR-W/BATTERY | eBay
Contain + Train™ Add-a-dog® Collar - Store | SportDOG
PetSafe Deluxe Add-A-Dog Collar - Claws'n'Paws Pet Supplies
Wireless Add-A-Dog® - Premier Pet
PetSafe Add-A-Dog Receiver Dog Training Collar at Tractor Supply Co.
Wireless Add-A-Dog® - Premier Pet
Amazon.com: SportDOG Brand SportHunter 1225X/1825X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies
Tek Series Gps Tracking Add-a-dog® Collar - Store | SportDOG