A new device uses the global positioning system to determine a cow' s location and, when a cow strays outside of its pasture, makes noises in the cow' s ears to steer it back to its home range  Outfitting all of the cattle in a herd with this device is far more expensive than other means of keeping cattle in their pastures, such as fences
The device' s maker nevertheless predicts that ranchers will purchase the device at its current price
The price of the device will come down appreciably if the device's maker is able to produce it in large quantities.