Join Date: Oct 2009
Location: Just south of sanity
You took him from his familiar setting and put him in a strange place. ALONE.
Of course he's nervous and skittish! He's a herd animal and you've deprived him of a herd, and are making him live in a strange place with strange people.
If you've had horses in the past, you should know that they're herd animals and can't be kept by themselves.
Until he gets used to you and his new surroundings, he's going to continue to be a nervous wreck. He also needs a companion animal. It doesn't have to be a horse, but best case scenario is another equid.