My appaloosa is currently staying at a friends farm where there's one other horse. I went out today to grain Cherokee (my horse) and anytime Goldie (friends horse) would come close to me Cherokee would charge her, chase her clear up the field speed up in front of her then almost corral her further up the field then come prancing back to me. All the while holding her tail high like an Arabian. I've never seen a horse act protective or territorial. Am I dreaming things up or could she actually have been keeping Goldie away from me? I should mention she's about 9 months preggers.