If rearing with a rider is not clearly linked to fear, disobedience or aggression, it may be linked to pain. An equine veterinarian can examine the horse's mouth and teeth, back, and feet for possible causes.
When a horse rears without a rider and there are no clear signs of fear, disobedience, or aggression, it could indicate pain. A veterinary examination of the horse’s mouth, teeth, back, and hooves can help determine possible reasons for this behavior.