How many horses can be in 1 acre?

only 2-3 otherwise they wont have enough room.

If you have 2-3, the pasture will need to be cleaned (meaning you have to scoop up all the poop- and there will be a TON! I would know, we had 3 horses on one acre. They now live on 9 and it's much better) it will need to be cleaned EVERY DAY. Hay will also need to be provided so they get enough forage because not only is there not enough grass to sustain them, but they will tear that pasture up running around then suddenly stopping and turning because they can't run far before they have to stop and turn. They should always have free access to fresh hay in such a small pasture. With only 1 acre, a minimim of one horse I would say. In an ideal situation, you'd have at least 2 acres per horse, preferably more like 5 per horse.