Good Doers and Those Prone to Being Overweight

All native pony and horse breeds, such as Irish Draughts, are exceptionally efficient at converting their feed and can do very well on a simple diet.

Overweight ponies and horses tend to have big crests and may have abnormal fat deposits elsewhere, particularly at the base of the tail. There appears to be a link between insulin resistance and these fat deposits. In trials, magnesium supplementation has been shown to help insulin activity, resulting in reduced fat deposits.