My TB gelding, Flint has recently become extremely herd bound to the point he's becoming unsafe to be around. Bit of a background leading up to this: We got snowed in end of march to the point my fences were covered and the horses had almost no where with low snow amounts to walk. Had to evacuate them to a barn nearby as they actually escaped on me and we had no way to clear the pasture. At first him and my WB gelding, TipTop, were on the bottom of the pecking order. Flint slowly worked his way into a small group and TipTop kinda floats. Then we got a two new mares and a yearling filly. They were picked on bad and out of no where Flint took over and started keeping watch of them and beating up anyone that came by them.
Forward to now, a couple weeks later, and he's extremely attached to all three but mostly one. If I try to take him away he calls for them almost none stop. Doesnt care what your trying to do and doesnt pay attention to you. First time after this I was grooming and managed to make it through. Sunday, a week after this, I couldnt even groom him as he would paw, yell and even try to kick. I try groundwork then try to go back to grooming and nope, same thing. Take him into the outdoor arena and work him on the line until he's calmed down. Hop up and ride him a bit. As soon as we stop and leave the arena he's a mess all over again.
Yesterday the farrier was out to trim them and a few others, one being his "girlfriend". He still calls even with her in the pen. We let him be the second last out of 6 to see if he would calm down. He appeared calmed but could hear the horses out in pasture and everyone starting calling again. He one foot done and she was trying to get the other front onto the stand. He just wouldnt. Then she tried to pick up that front one and with the same back leg he kicked towards her, just brushing her head. She said she couldnt continue and I don't blame her, so no finishing on one front and nothing on the backs (he was done 4 weeks ago so not badly overdue)
After we finished talking I went to work him in the round pen again and he actually got pretty sweaty and a good work out, was pretty tired by the end. Then again we leave the arena and he starts at it all over again.
Now, I can't work him extremely hard due to a SI injury 3 years ago. He can do w/t limited canter till he builds more muscle and no collection unless he does it all on his own on a loose rein.
I've owned him since 2006 and he's 12 now. I have never had him act like this since I've owned him so Im really confused on what to do. We are thinking of trying natural calming herbs or something of the sort. I would really like training advice too though. We really don't know what to do with him at this point
If you read this all, thank you! I know its long.