What would cause a horse to go completely bat-**** crazy on another horse? (pardon my language).
I literally had to beat my cousin's mare Patch off of my mare Gypsie with a pole about two hours ago.
I got home from work and had gone out to doctor my horses hooves and feed them. All of the horses were grazing on top of the hill above the barn, but my three came running down when I called them. I had already gotten Gypsie and Dakota haltered and tied at the barn and had walked across the Lot to get Joyce when Patch and the other horses came meandering down. Patch has NEVER acted aggressively, though she and my gelding Dakota have played pretty roughly in the past.
Patch didn't even stop, she made a beeline straight to Gypsie and rushed at her with her ears pinned and ran her into the barn, where she pinned her in the corner and began kicking the daylights out of her and squealing! Gyps couldn't get away 'cause she was tied and tried to run back and forth, but ended up falling down because the rope wouldn't give like it was supposed to (I tie with a loop that is supposed to give should my horses put too much pressure on it, but it somehow got twisted and didn't give like it was supposed to).
By the time I managed to beat Patch off my girl, she was back on her feet, thankfully. Poor Gypsie was shaking so badly, and Patch was still attempting to rush her (but not any of the other horses), so I decided it was safer to feed and doctor my horses in the front yard.
After spending time checking Gypsie over (after she quit shaking and flinching whenever I touched her), I fed and groomed them all, especially her... but still... I dunno why Patch, who has never shown any aggressiveness and is a passive mare in general, would suddenly turn nuts like she did...
My poor Gypsie is hurting and swollen up where she was kicked. She was kicked (with both back legs) on both shoulders, both sides of her butt, her left side, the upper part of both front legs, and on her back lower leg at the fetlock so badly that it cut her leg open (not horribly, but still...!). I doctored her up and am definitely keeping an eye on her and going to check her again tomorrow after work... but she's already walking stiffly and is already sore... I feel so bad for her and upset at the other horse....
I swear, if I had had a gun on me, my cousin's horse would have been dead.......... (that's how upset I am!)