Join Date: Jan 2013
Location: Fort Lauderdale, FL
Just a few questions to throw out:
Feed? What is he on? I've found sweet feed is not good for most TBs and they really need a high fat and high fiber diet to help them concentrate.
Feet? How are his feet? I would love to see pictures of his feet including soles to see how they look.
Ulcers? Have you treated him for ulcers? I put all my OTTBs on a minimum of 30 days of Equishure to treat ulcers and hindgut issues. Most are off of it by 60 days and only had 2 go to 90 days but they had a lot of ulcers.
Obviously he has a cold back and a serious defense mechanism for it. I would really get the chiropractor out again along with a massage therapist to double check his alignment.
Next I would purchase a cheap bareback pad (no stirrups just plain pad) and put it on him in a round pen and let him buck it out. Once he is done bucking (it really does a number on their backs) have your therapists show you a few moves for helping to keep the back in line. Do not ride yet, do this for 2-3 days or until you can put the pad on, do his massages, and you get no explosive reactions.
Once he has stopped his fits, put the saddle on and hand walk him 10 mins. Most horses are walked before their morning exercises so their backs are warmed up. Once in the saddle, always use a mounting blocks, the amount of torque used is very hard on their backs. Do not sit down quickly, stay in 2 point for at least 10-15 strides than gently lower into the saddle. Spend a minimum of 10 minutes doing slow warm ups, lots of walking on a loose rein to let him stretch his back, lots of circles, changes of rein, serpentines, figure 8's, etc until you can start slowly getting him to trot on a light contact.
Keep trying various things until you can find his key, it really sounds like he needs a good massage pre and post ride, and a long warm up. Please at least try the 10 minute hand walk pre ride to let him warm up.
Good luck !!