The digestive system of a horse is much different than that of cattle, and that's why the plastic net will kill a horse. Horses can die eating moldy feed, while a cow won't. Most years I feed my horses square bales that have been kept inside and are mold free, being very picky as to the hay I feed. Some years I have to feed round bales, and always try to feed the ones that have been stored inside and were baled dry. However, this year I'm running a few calves with the horses, and have been feeding round bales that were kept outside. I just keep plenty of them out so the horses can have enough good hay to choose from. I also much prefer the sisal twine to the plastic, as I hate having that plastic being left on the ground, though I usually take the time to remove it before feeding.
