I may move, and where I may go, the hay is almost all round bales.. For $100 you can get round bales of hay ranging from 900-1300 pounds, and for $12 you can get a 60 pound bale, everything is grass/alfalfa mix. But, the thing is.. I have one horse. Although I would probably have like a couple boarders (up to 5, but obviously not at first), they would be kept in stalls overnight most likely, but dry-lot turnout during day .. I would really like to be able to have round bales, because they cost way less, but I don't want the bale to mold .. What if the bale is kept under cover in a shelter while the horses munch on it? And, it would only be during the day when they have dry-lot turnout, they would have square bales during the night, I guess. Would it still mold, even if under a shelter, with about 4 horses on it for 8 hours or so a day? I am kind of confused here, what is the difference of being stored in a open hay barn and being eaten by horses while in an open shelter? There is not a shelter on the property we are most interested in, but, we would build one, and, there would only be one wall to block the big storm winds but to allow many horses to feel comfortable in it while eating hay. Opinions?