I drive by several fields of horses on my way to/from work, and i’ve always wondered… how to they they get that muscular with no protein? Sure owned horses might get a special feed that isn’t just grass, but wild horses don’t have access to that. As far as I’m aware, they just eat grass. Maybe the occasional fruit if they stumble upon one. Seems like an extremely low-nutrient, low-calorie, low-protein food for such a massive, muscular animal.
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They do not get their protein from plant matter. Like humans, they have a bacterial flora in their digestive tracks. The nutrients from plant matter feeds those bacteria, which promotes colony growth. When not feeding, parts of those colonies die off and get digested. That is the horses protein source.
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