These girls have been fighting for 3 days and it's getting ugly! Pound-for-pound it's a pretty fair fight but the one on the left is 4 years older & currently sporting a nice gash on her forehead, the one on the right now has a noticeable limp. Not unusual for our cows to spar before & after they calve or when they rejoin the herd if they've been sick/doctored/etc and there's the occasional battle over hierarchy but I've never seen any of them this fired up for so long. They're worse than the bulls! What's going on?