Javascript is either disabled or not supported by this browser. Javascript is either disabled or not supported by this browser. After much frustration you had the horse checked by your veterinarian and it couldn't be determined what was troubling him. Two very common elements that bother horses are fear and pain. Undue stress and tension in any part of the horse's body will have an adverse effect.
Horses avoid any movement causing pain.
If you feel your horse is in pain, then it may be time for you to try sports massage on your horse. Massage concentrates on muscles which cannot secure their own release. Sometimes sensitive muscles evolve into orthopedic type injuries and issues. Massage enables freedom of movement by reducing the resistance to motion. Sports massage is not new to the equine world.