Reply #21: If you are up north and the cows are all black

[Kali]

they are naturally hornless - Aberdeen Angus, most likely - there are naturally polled red angus, and herefords as well. We call them muleys because they tend to have kind of pointy heads and it makes their ears look bigger, I guess.

I am sure there are other hornless breeds, but for the rest the calves are usually dehorned when they are young before the little horn-bud attatches to the skull. We don't do it because it is part of the way they protect themselves and their babies from dogs and coyotes etc.