Well I was out with my grandson once and it was a public footpath and thought this lot wouldn't move out of the way easily, also they had calves and I didn't want to upset them. Anyway we decided to use the lower bit by the stream to pass them using our bikes as a shield in case one tried to head butt us and we could jump across the stream in an emergency.
http://i304.photobucket.com/albums/n...ps24manct4.jpg