Virtual Fencing with Nofence

Status: Early commercial

It's a real product I'm planning to buy, not something I'm building.

How it works

Every animal wears a solar-powered GPS collar. I draw the paddock in the Nofence app. When a cow walks toward the line, the collar plays a sound; if she keeps going, it delivers a short electric pulse, which Nofence compares to a regular electric fence. There are no buried wires and no base station (Nofence: How it works).

• Training: most cattle learn the audio cue in 4 to 7 days. Nofence recommends starting with the virtual line laid over a physical fence; a herd counts as trained after four straight days inside the boundary (same source).
• Sound vs. pulse: after training, Nofence reports 96% of boundary interactions are resolved by sound alone (vendor figure, same source).
• Battery: solar keeps the collar charged; in long low-light stretches the cattle collar runs about 120 days on reserve (same source).
• Containment: Nofence reports a 99.7% containment rate (vendor figure, nofence.com).

Coverage

Collars use LTE-M over AT&T, T-Mobile, and Verizon, and relay to each other over Bluetooth ("HerdNet") so one connected collar can update the herd. The fence holds on GPS with no signal at all; you need coverage to move paddocks remotely and get alerts. Satellite connectivity for the new N3 cattle collar is announced for spring 2027 (Nofence coverage guide).

Cost

Nofence's US cattle page now says to talk to their team about the new N3 collar and doesn't list a price (Nofence). The last published figures I found (DTN, April 2025, earlier collar): $289 per collar, first-year subscription $56 per collar for 49 collars or fewer, then $6.50 per collar per month for 49 or fewer (DTN). Nofence mentions that USDA EQIP funding may be available, and Missouri NRCS approved cost-share for virtual fencing in 2025 (Farm Progress).

What it means on around 20 acres

• Every adult animal needs a collar. Uncollared cattle cross freely and the rest may follow (Nofence FAQ). With a small herd, the collar count is small too.
• Calves: young animals must be big and mature enough to wear one (Nofence user guide), so I'll keep a solid perimeter fence.
• GPS buffer: Nofence advises designing with a 3 to 5 meter buffer (FAQ). On small paddocks that buffer is a real share of the area, so I'll draw them accordingly.
• Midwest evidence: Mizzou is running a three-year virtual fence project with five Missouri producers (Mizzou CAFNR). One participant hopes to replace a daily 30-minute hot-wire move by scheduling a week of moves from home (Farm Progress).

How it ties to my robots

Nofence moves the boundary. My water robot needs to move the drinking spot to match, within about 800 feet of every point in the paddock (UK Master Grazer). The long-term goal is one schedule that drives both. See mobile clean water.