Regularly get cow issues, often when there blocking a gate and get a bit "excited" as I try to go in field. Usually more scared of us than we are them I know, but some of the big cows/bulls don't always see it that way.

I was chased for 2m by a small herd once, in a long Wolds valley whilst running Wolds Way they'd stop everytime I stopped looked around and made noise/gestured, but start again as I ran. And wasn't really in mood for any sprinting after 45m of overnight run. Later in the day went off route and climbing over a gate into a field, didn't see the bull under a tree shadow until I heard cartoon-like snorting and saw it drag its front foot aggresively - decided to go around that field.