> As a cow approaches the virtual boundary, the collar annoys the cow with sound. The closer the cow gets to the boundary, the louder the sound becomes. The col

> As a cow approaches the virtual boundary, the collar annoys the cow with sound. The closer the cow gets to the boundary, the louder the sound becomes. The collar administers small, annoying shocks if the noise doesn’t persuade the cow to turn away. I am, as usual, cynical. Cows go through fences regularly. With something like this, the cow that takes a notion it needs to be somewhere will have followers. I don't even want to think of the chance of false activation, the receiver component fails and it decides its out of zone, while the cow is in the middle of the herd. It's gonna freak out and get everybody rolling.