I looked at hydration hay (interweb search) and could see why you consider it. I personally had never heard of it before now. Seems you'd need at least a whole block, which from what I read weighs 25lbs. Sounds doable. But I'd think you'd need to get your horses on it way ahead to be sure how much they'll really need to eat, and get used to eating it. From what I read its finely chopped Timothy and alfalfa, I'd be concerned that one bale wouldn't be enough for three nights of good riding, so youd carry 2, and there'd be no long fiber. Just to me personally, I'm thinking it could cause some issues. Health wise. But maybe I'm wrong.
Maybe you could tell us a lil more about your trip so we could help more? Posted via Mobile Device