My horse (Milkshake) and my dads horse (Tazz) stay in the same pasture together. They used to get along but now they arent. Tazz has been kicking and biting Milkshake. They are both mares. I am worried about Milkshake. I compete with her so I need her to be in good shape but with tazz she is getting kicked and but. I want them to get along because my dad got tazz to be riding buddies with Milkshake
Mares tend to be bossy and one can try to be the leader. My mare worked her way up the heirarchy of 5 mares, and got kicked in the face badly during the process. Certainly I would have liked to separate her from the others, but was in the hospital at the time. However, she succeeded in reaching the top of the chain and used to double-barrel kick the other mares after that! It may be a leadership/dominance issue, and to keep them from hurting each other they should be kept apart, at least initially, and allowed to "talk" over the fence. If the talkiing is sweet, maybe they can be reintroduced to each other.
I think that you should really leave them alone and allow them to work it out.
What looks like abuse and scary is just really horses being horses.
Seperating them and then reintroducing them only restarts and prolongs the fighting.
There are 26 horses here divided into 2 herds with only the stallion seperated from the rest. After introducing a new horse yes they fight and yes some have bite marks and scrapes but for the most part none are seriously hurt. None have required a vet. They will work it out. I beleive as someone has already noted that one may be working her way up to dominating the other, Shalom