Why Calf Calls? A calf’s call is easy to distinguish from a cow’s.  Cows and calves call back and forth to each other throughout the year.  Bulls and cows will often come to a calf’s call to round them up and bring them back into the herd.  A calf’s call is not intimidating and there is no doubt the Baby Hoochie will bring bulls straight to you that would not have come otherwise.