Add another dog to your current SportDOG Brand Contain + Train system (SDF-CT) or replace a Collar Receiver with the SDF-CTR Add-A-Dog Receiver. The Contain + Train system's Containment mode expands to any number of do...

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Add another dog to your current SportDOG Brand Contain + Train system (SDF-CT) or replace a Collar Receiver with the SDF-CTR Add-A-Dog Receiver. The Contain + Train system's Containment mode expands to any number of dogs and the Training mode expands to 3 dogs.

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