Join Date: Jul 2010
Location: East Central Illinois
It's called "barn sour" and "herd sour." A horse can be herd sour and not be buds with any other horse in the herd. It's just their nature to find comfort in the barn with the stall, food, water and safety and to find same with the herd.
I recommend an exercise to use and you will need an outdoor arena with a gate that can be shut and secured. Walk your horse in the arena, CLOSE THE GATE, and mount up. Start by working on one rein at a time, right rein means you are riding clockwise, left rein means you are riding counter-clockwise.
You ride quickly away from the gate at a canter, slow to a trot 1/2 way around, then slow to a walk 1/4 way from the gate. Be ready to canter off as soon as you get to the gate. Repeat, repeat, repeat. Change reins and repeat. Do this for a good full hour, maybe 5x on right rein, 5x on left rein, etc. Get your horse to be totally obedient to you every time, even if it's a fight. This is an obedience exercise, to teach the horse that YOU decide where the ride goes. The repetition will give your horse confidence in your leadership, and can be repeated later at any place.
Often people buy a horse or ride a horse so that the horse can decide to race back to the barn and herd. You are always training, so the horse is trained to do this. By moving quickly away from the gate it is like moving quickly away from the barn. ALWAYS walk your horse back to the barn. If you've having a fight to stay at a walk, dismount and hand-walk back.