Most GPS fences are designed for about a third of an acre to half an acre or more: SpotOn designs for about 1/3 acre and PetSafe's Guardian GPS 2.0 for 1/2 acre without dense trees. Halo is the exception, stating fences from 900 sq ft. On smaller lots, an in-ground or wireless fence usually fits better.
Stated minimums
| System | Maker's stated minimum |
|---|---|
| Halo Collar 5 | Fences from 900 sq ft |
| SpotOn Nova | About 1/3 acre |
| PetSafe Guardian GPS 2.0 | 1/2 acre and larger without dense tree cover |
Why GPS needs room
GPS positions wander by several feet, more under trees and near buildings. The collar needs space between the boundary and your house so it doesn't correct your dog on the patio.
Halo's claim of fences from 900 sq ft is why Halo Collar 5 is often the only GPS option for suburban lots.
Smaller yards
- Wireless circle: PetSafe Stay & Play covers a circle up to 3/4 acre.
- Buried wire follows any shape: PetSafe Basic In-Ground.
- A physical fence remains the most reliable option.
Products mentioned
Halo Collar 5
Fences from 900 sq ft upward, stored in the collar; membership required.
SpotOn GPS Dog Fence (Nova Edition)
Fencing works without a plan; tracking is an optional add-on.
PetSafe Guardian GPS 2.0 Dog Fence + Tracking
Dual-frequency GPS, up to 70 hours per charge; plan required.