For grazers, there is an enormous list of green items that horses can’t eat. However, there are a few that they can graze (that are even good for them!) & mint is one of them.
Of course your horse can’t enjoy a mojito, but it can benefit from some of the same properties we do in the mint (Mentha) plant. Mint aids digestion, makes great tea & horses actually like the flavor of it (how can they not?). It’s refreshing to see a plant that horses don’t have to avoid.
Beyond anything else, mint gives horses fresh, minty breath & that’s a lovely thing!