Cows aren't quite like humans, and calves aren't quite babies. Whereas human babies are basically a puddle for the first few ...

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.

With calves weaned, veterinarians criss-cross the country conducting pregnancy checks, or preg checking, cow herds. The vet calls out and marks an “O” on the hips of “open” or non-pregnant cows.