Technology enabling virtual fences for pets is now being adapted for livestock. Ranchers near Yellowstone National Park are testing its ability to keep cows safe from grizzly bear attacks.

Ranchers test virtual fence technology's ability to keep cows safe from grizzly bears

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Ranchers test virtual fence technology's ability to keep cows safe from grizzly bears

Ranchers test virtual fence technology's ability to keep cows safe from grizzly bears