DO NOT go near cows with calves, they can be as protective as any mother on earth.
If it has big muscular neck, don't go in the same field. It is probably a bull. Even if it hasn't got horns.

Carry a stick. Cattlebeasts know about sticks


Intimidating big bastards, though, aren't they, even when they are just being nosey. You are having a quiet fish, and then a big head appears on each side of you.....