“Here Jack!” Or, if you are of a mind, “Here Kyle!”* And more often than not, he comes– especially if you have a carrot in your hand. The other day we drove the truck into the pasture and he came right up.
I did learn that petting him across the barbed wire was foolish and potentially painful. Also, remove fingers before he gets to the end of the carrot.
*More on the naming arrangements some other time. FYI: Kripke’s name came up.