Roxy is still a bit skinny for my liking - not ideal going into winter. She shares quite a small paddock (approx 2 acres) with 2 other mares so there isn't really enough grass. She comes in during the day between 9am and 4pm and has adlib hay and two small feeds which at the moment are Hi Fi Lite, Spillers Low Cal Balancer, and her farrier's formula supplement. I think I need to bulk out her hard feeds a bit - normally I'd just add in Speedibeet but I am riding her a lot more now that I am freelance and have the time! So I was thinking of changing her to Hi Fi (instead of Hi Fi Lite) and maybe trying something like Spillers Cool Mix. I don't want to blow her mind though and I have a bit of a natural antipathy towards anything too starchy, having had a horse with ulcers previously. Has anyone got any suggestions? She is a 14.2 Warmblood, generally a good doer but as I say not enough grass in her field, and she is staying there for the winter.