SportDOG Brand In-Ground Rechargeable Fence Add-A-Dog Coller

The SportDOG Brand In-Ground Rechargeable Fence Add-A-Dog Collar (SDF-CR) is an expansion collar designed to extend your existing SportDOG rechargeable in-ground fence system to additional dogs over 8 pounds. This compact receiver collar lets operators manage multi-dog containment without replacing the entire system, making it the practical choice for handlers managing working dogs, service animals, or household pets requiring reliable boundary control.

The SDF-CR receiver features a lithium-ion rechargeable battery that fully charges in two hours and maintains 1–2 months of operational battery life per charge cycle. The collar delivers seven levels of static stimulation alongside vibration and tone alerts, allowing precise intensity adjustment matched to individual dog temperament and training methodology. The small, lightweight form factor minimizes interference with standard collars and harnesses while maintaining durability in field conditions.

This add-a-dog collar integrates seamlessly with the SportDOG SDF-100C rechargeable in-ground fence system, enabling unlimited expansion to multiple dogs without signal degradation. Handlers working with K-9 units, service dog programs, or multi-dog households benefit from the modular design—purchase additional collars as your operation scales. The rechargeable battery architecture eliminates disposable battery logistics, a key advantage during extended deployments or remote training operations where resupply cycles are irregular.

The in-ground fence category offers a containment solution without visible barriers, preserving sight lines and aesthetics while maintaining secure boundaries. SportDOG's receiver technology has established a reputation for reliability in working-dog applications, and the rechargeable collar format aligns with modern field equipment standards favoring integrated battery management over disposable cells.