Answer: Yes I agree, he is too big, a horse should only carry about 20% of its weight, if in shape, that does not mean add a few hundred pounds to get a higher 20%. Most horses today are over weight, 15 hands at 1300 sounds like the horse is over weight.
An indecent assault and battery is an intentional and unjustified touching of a private area, including, but not limited to, the breast, abdomen, thigh, buttocks, genital or pubic areas of a female or the buttocks, genital or pubic areas of a male.
In some jurisdictions assault is defined as the threat of bodily harm that reasonably causes fear of harm in the victim while battery is the actual physical impact on another person. If the victim has not actually been touched, but only threatened (or someone attempted to touch them), then the crime is assault.