I run most mornings, often through fields of cows, they all move, never had one even stay in the way if I keep going towards them, they are pray animals, we are predators, but two years ago one did not move as I came through a kissing gate, as usual I thought it would move back, I even turned my back on it to close the gate as I turned- it stepped forward fast – threw it's head in to my chest and threw me on to the gate post, (broke a rib, and cut open my shoulder blade), I got up some what quickly (hoofs!?*!) looked around and it had a still born calf 15' away. The foot bridge I was coming off is now locally called 'Dead Calf Bridge'.