My husband and I rescued a horse that was malnourished in his former home. He was being kept on about an acre and a half with a donkey, mule, steer, alpaca, 5 goats, chickens, and 2 pot belly pigs. His owner was feeding him a mixture of oats and corn and the other animals would chase him away from his feed. He is about 20 years old from what our vet has said and has been putting on the pounds since we rescued him. Because of his age, I saw he is swaybacked, however my neighbor who owns horses says that it is just that his withers are prominant due to the malnourishment and that hs is high withered. Opinions?