I have never used round bales before, but with the price of hay I was thinking about putting one in the pasture to take the place of the AM hay, Then they would come in at night with 2-3 flakes.
Wondering about mold, my hay guy wouldn't sell me one because of mold. Is it worth it for two horses or would they waste more than they ate, would it mold before they finished?
No it is not, as far as I'm concerned
I have four horses and I will never feed round bales - never.
1. The mold issue; hug your hay guy, buy him lunch, or both for being so honest. Most sellers of hay don't give a flip, they just want their money.
2. Then there's rats looking for a warm place to stay in the bad weather.
3. IMO, my four horses couldn't eat even a small round fast enough to keep from having a large amount of waste due to the environment.
3.1 Then there's always that one horse that wants to "take care of business" right in the hay droppings that you could've re-used, had that horse not done its business right there.
4. You have no control over how much hay they eat; some horse will eat until they explode and that means they are not moving around, so nothing's getting exercised but their lips.
I felt this way about round bales for a small herd of horses before I had two that developed metabolic issues.
If a roundbale is all you can swing, at the very least, find a place to keep it under cover, setting on a pallet or plastic and chain saw off the amounts you want your horses to have. No over-eating and not as much waste.