Dogtra EF3500 Additional Collar

The Dogtra EF3500 Additional Collar: Dogtra EF3500 Additional Collar adds a second (or additional) dog to your existing EF3500 underground fence system.

Key Features

• Genuine Dogtra: Premium e-collar and dog-tracking brand trusted by professional trainers since 1988
• Additional collar for EF3500 underground fence
• Adds another dog to existing system
• Pairs with existing EF3500 transmitter
• Same correction levels as original collar
• $89.99 affordable expansion

About Dogtra

Dogtra is a leading premium e-collar and dog-tracking brand. Founded 1988, based in California. Trusted by professional dog trainers, hunting dog handlers, and serious dog owners worldwide. Strong product lineup includes the Pathfinder 2 GPS tracking + e-collar systems (NO annual subscription fees, unlike competitors), traditional EF3500 underground wire fences, modern GPS-based virtual fences, and bark-control collars. Built to professional standards with rugged waterproof construction.

Dogtra Product Lines Quick Reference

• Pathfinder 2 (GPS + E-Collar) Track AND train. NO annual subscription. For hunting dogs, working dogs.
• Pathfinder 2 Mini Same Pathfinder 2 in smaller collar size for smaller breeds.
• TRX Collars Tracking only (no e-collar stim) add-ons. Save $20 over full e-collar versions.
• EF3500 Traditional underground wire fence. Most reliable boundary system.
• GPS Fence Virtual GPS boundary, no wire needed. Portable.
• Smart Fence Premium smartphone-controlled GPS fence with real-time tracking.
• YS Series Bark control collars.

Frequently Asked Questions

For existing EF3500 owners:
You ALREADY OWN the EF3500 system. Buy this collar to add another dog. Multiple dogs can use the same buried wire just need a collar per dog.

For new buyers:
You need the full EF3500 Kit ($269.99) FIRST this collar alone won’t work without the transmitter from a kit.

Authentic Dogtra?
YES CSO carries authentic Dogtra product. Comes with full manufacturer warranty.

Warranty?
Dogtra 2-year manufacturer warranty against defects. Lifetime customer support.

Warranty

Dogtra 2-year manufacturer warranty against defects. Military and First Responders are encouraged to use credentials in the cart section before checking out.

Specifications