I had trouble keeping weight on my 27 year old Warmblood mare last year, I was recommended by an Equine Nutritionist to feed her Dengie Alpha Oil, Baileys No. 4 (Conditioning Cubes) and Barley Rings, this has really worked and she is looking really well now. When she was younger she was a good doer and I fed her Sugarbeat to bulk out her food not put weight on.