If I only had 1 or 2 horses, unless it was winter, I wouldn't bother with a round bale. They need to be eaten fairly quickly so as not to mold or mildew. I go through roughly 3 1800 lb round bales/2 weeks, so that's pretty close to 3 tons of hay every 2 weeks. I feed squares (50 lbs each) when I bring the horses in during foul weather, it takes about 4 squares per meal for all of mine, so that's throwing out a lot of hay several times a day if I didn't have the round bales. As it is, they eat all they want 24/7 and stay in good flesh, especially in winter.