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Expand your FieldSentinel GPS fence system to a second dog
The FS-AD is the only Add-A-Dog collar compatible with the SportDOG FieldSentinel series — it will not work with any other SportDOG system, and no other Add-A-Dog collar will work with the FieldSentinel. If you own a FieldSentinel FS-825 or FieldSentinel FS-1825 and want to run a second dog on the same GPS containment and training system, this is the required collar.
The FS-AD delivers the full FieldSentinel feature set on the second dog — GPS containment boundary enforcement, remote e-collar training (tone, vibration, and 7 levels of static stimulation), and BodyGuard™ health monitoring alerts. The collar that came with your FieldSentinel system is default paired to Dog 1. Pair the FS-AD to Dog 2 and you’re running both dogs from the same transmitter with independent control of each. Range is 1 mile, matching the base system.
Compatible systems
| FieldSentinel 825 | FS-825 |
| FieldSentinel 1825 | FS-1825 |
Specs & features
| Range | 1 mile |
| Stimulation | Tone, vibration, 7 levels of static (continuous and momentary) |
| GPS containment | Yes — full boundary enforcement matching base system |
| BodyGuard health alerts | Yes |
| Waterproofing | Submersible to 3 feet |
| Battery | Rechargeable Li-ion — 2-hour charge |
| Dog size | 8 lbs and up, neck sizes 5”–22” |
| Max dogs on system | 2 (1 base collar + 1 FS-AD) |
The FS-AD is exclusively compatible with the FieldSentinel series. It will not pair with the FieldTrainer, SportHunter, HoundHunter, or any other SportDOG system. If you’re not sure which system you have, check the model number on the back of your transmitter.
