Do male cows hurt baby calves?

I've never heard anything like that happening before. I have heard sometimes of bulls becoming babysitters for calves occaisonally, but I've never heard of bulls being harmful to newborn baby calves. He may butt a calf out of the way if he's in a hurry to get one of the cows bred, or to set it in its place in the pecking order, but never to intentionally hurt it.