In hill country, you can look up the steepest slope and witness to your amazement cows and sheep grazing. You might think to yourself, "That's gotta be uncomfortable, even downright dangerous!" But you could say those cows and sheep found their niche. They've got that slope all to themselves with no competition from the animals from the plains. That is, until the cows and sheep on flat land run out of room down there and come looking for fresh grazing grounds on the slope. Things could get testy.