There’s a small (5 acres maybe) field by me where the farmer keeps horses. He moves the horses from one half of the field to the other and grows hay in the oppo

There’s a small (5 acres maybe) field by me where the farmer keeps horses. He moves the horses from one half of the field to the other and grows hay in the opposite side. I see him cut it down and bale it about twice a year. Looks like it’s pretty self sustaining. I’ve never stopped to talk to the owner about it.