Ok. Since you don't know what percentage protein her hay is, and you can't measure how much she is actually eating since it is a roundbale, we will need to assume it is low in just about everything. I would recommend you get her on a high (12-14%) protein grain that is also higher fat (10%+) and is completely balanced for a horse. It would be helpful if you could tell us the brands you have available to you. You the. Need to measure how much 1 scoop of grain ACTUALLY weighs. Some of my hard keepers and rescues have required the high end of what the bags required though 8-12 lbs of grain were most common- split into 2-3 means. Supplementing with oil or alfalfa pellets can also help. But if you get us that information we can help you fastest.
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