I'v also noticed little things, like going on a road ride with my friend and her mare that he adores and gets alone great with, and he started pinning his ears (legit pinned back, which I rarely ever see him do), and lowering his head and neck. Almost in a snaking motion.
So my questions is. Why so aggressive, so suddenly? And why just this horse?
I have a theory. My theory is that he is just, bored, and a jerk. And takes his boredom out on others. I come out to see him on my days off, but don't always ride, and when I do, ill admit lately iv been lazy so he hasn't been worked to exertion. Also we just got over a heat wave, so during the heat wave (about a week) he wasn't ridden or worked at all.
We also have a new horse on the property, a younger mare, she's not in his field, but in a field adjoined to his (well his old, none solitary one)were he could see her. And the gelding he beat the snot of, was infatuated by her. Could that effect the situation? Even tho she's not in the same field?
Also not sure if its important. But he's on half a small scoop of textured sweet feed at dinner, just so he can get his supplements (glucosamine, farriers formula, and biotin) and other then that he's on turn out in a grass field, with access to hay as well.
Any opinions would be appreciate it! Sorry for the novel