As a nutty 3.5 -4 year old, I had him scoped. We did 30 days of omeprazole and I think 15-30 days of tapering doses. Thank the powers that be that he was insured!!! The chiro was out once then. My vet is a certified chiro and he went through a bucking incident when being saddled or mounted about a year ago. Admittedly, I was only riding 2 times a week at that time and he went “feral”!!! He we fine when saddled but the first steps off got him upset and he bucked. Or, he’d walk to the mounting block and tense up/raise his head, shake then buck when I mounted. Sometimes. It got to me stepping off to the mounting block and yelling at him, or not throwing my leg over and yelling at him, and he’d relax and happily walk off. I didn’t want to teach him that this behavior got him out of work, but I found if I could re-direct his brain, he was OK. Seriously, he would wait for my cue and then loosely walk off. He had lost some weight (he does in winter) and I thing the saddle shifts more on his withers when I put weight in the stirrup and he didn’t like that. I also did carrot stretches after putting the saddle on (which I always do when finished before putting him up) and he would NOT bend his body with the saddle on. He freaked when he did bend and his shoulders touchen the girth leathers that stuck out because they weren’t done up yet. Radiographs of his withers and spine to rule out kissing spines - his spine was pristine. My current vet is a certified Chiro and did 3-4 sessions with him through the late spring and summer, found tension in his neck and where it tied into the shoulders, some in his lower back, but no obvious problems. Also did laser therapy. She decided the schedule and when to stop, not me. I followed all of her directives for stretched and muscle-building exercises to rule out other potential issues. He went through periods of goodness, hypervigilance (but manageable) and “Something’s gonna kill me” - rinse and repeat. I can’t find a pattern. No one else can, either. I follow my vet’s advice (she also competes warmbloods) but I don’t have $$$$$$$$$ to take him to NC State to radiograph/ultrasound/MRI his whole body to find a problem and then follow up to see if that’s really the problem or just an incidental finding.
So, we’ve had a 7 day clinic going on. One trainer put his horse in the ring-adjacent playground all week. I had my horse be loose in the arena, and he stood at the Gate of Doom trying to get this mare’s attention for 2 hours yesterday. All was fine until feeding time when he walked to within our view to say “helloooooo, it’s dinner time!!” Today, as everyone was riding in the arena, I turned him out in the playground where he pitched a fit, trotting, galloping, jumping over an obstacle multiple times, bucking… he sure didn’t look in pain and he could have just stood there. I have hand-grazed him repeatedly in this same space within the last 2 weeks because there is so much clover and he LOVES clover. His behavior even in his own pasture makes me disinclined to think he’s in pain. I could be wrong, but none of my “horse team” thinks there’s pain, either.