Sheep GPS Trackers Compared: Collars vs Ear Tags vs Virtual Fencing — What Suits UK Flocks?

Search for a sheep tracker and you'll be offered three quite different technologies wearing the same name: GPS collars that report a precise position, LoRa ear tags that locate the whole flock through your own on-farm network, and virtual-fencing collars whose real job is containment. Each is right for somebody. The trick is knowing which job you're actually hiring the device to do.

The three approaches at a glance

• GPS collars — the animal carries its own GPS fix and reports it, either over LoRa to your gateways or over the 4G network with a SIM. Precise, heavier, rechargeable.
• LoRa ear tags — a lightweight tag reports to gateways you own; the network works out a paddock-level position. Cheap enough for every ewe, battery lasts seasons.
• Virtual-fencing collars — GPS collars that keep stock inside a boundary using audio cues, with position data as a by-product. A containment tool first, a tracker second.

GPS collars: precision, per animal

A GNSS collar carries its own satellite fix and reports an exact position — in Flockarewe's range it sends that fix over LoRa to your gateways, runs on a rechargeable battery with solar assist, and weighs in the region of 150–300 g. A 4G collar goes further: it reports live over the mobile network anywhere with signal, which makes it the right answer for stock in transit or away on agistment — but it carries a data SIM, and that means a monthly cost per collar and a battery measured in days to weeks.

For sheep, the arithmetic is the constraint. Collars earn their keep on the animals you genuinely need pinpointed — tups, high-value breeding ewes, the leaders of a hefted cut — not across three hundred head. Every collar is a device to recharge and a rotation to manage.

LoRa ear tags: built for whole-flock coverage

A LoRa ear tag flips the model. At roughly 25 g it hangs like an ordinary management tag, runs one to three years on a sealed coin cell, and carries no SIM — it reports to solar gateways you own, and is located by which gateways hear it. That gives a paddock-level position rather than a satellite-precise one, which is exactly the resolution most flock questions need: is she on her ground, has the mob scattered, who hasn't reported since yesterday?

Because the network is yours, it works on fells and in valleys with no mobile signal at all, and adding another hundred ewes adds no network cost — just tags. That's what makes per-head tracking economics work at flock scale.

Virtual fencing: a different job entirely

Virtual-fencing systems — Nofence is the name most UK graziers know — use a GPS collar that plays a rising audio warning as the animal approaches an invisible boundary, followed by a mild electric pulse if it keeps going. Stock learn the cues quickly, and the boundary moves with a tap on a map. Used on cattle, goats and sheep, it can graze ground that's impossible or uneconomic to fence.

But be clear about what you're buying: it's fencing, not record-keeping. You get position data because the collar has GPS, but the hardware is collar-grade — rechargeable, heavier and priced per animal accordingly, typically with an ongoing subscription per collar. If your problem is containment on unfenceable ground, it's a genuine answer. If your problem is knowing where 400 ewes are and having the records to prove it, you'd be paying for an electric fence you don't need on every animal.

So what suits a UK flock?

• Lowland flock, fenced paddocks: LoRa ear tags across the flock for location, geofence alerts and records; collars rarely needed.
• Hill and fell flocks: ear tags on everything (they work with zero mobile signal), GNSS collars on tups and lead ewes you want pinpointed.
• Stock that travels — sales, agistment, transit: a 4G collar on the load, because it works off-farm wherever there's signal.
• Conservation grazing on unfenceable ground: virtual fencing earns its cost — and nothing stops you running cheap ear tags alongside for the records.

Flockarewe runs the first two side by side: LoRa ear tags for the whole flock, GNSS and 4G collars where precision matters, all on one map with the same geofences, alerts and register. Mix them freely — the platform doesn't care which device a position came from.