my horse was on the 'fat' side and a person told us it was because we were rugging her up 2 much we stopped putting her rug on so much not really expecting the best but in a couple of week she had reduced her size now her girth fits perfectly!

well sectioning off isnt always avalible coz some people are at livery yards, if so, put her in a paddock, they may cost a lil more, and be smaller, but dont have as much grass, or a grazing muzzle would be great :) also try cutting out get feed, chaff is great so is hay, but no haylage, try giving her a balancer, to maintane her weight, & low fat mixes ext

hope this helps x tatum x