How many horses can 1 acre support in Missouri?

Typically a single acre is not considered enough to support even one horse. This is due to the amount or lack of grazing available, possible mud due to lack of space to rest the grass when it is wet, and how hard it can be to maintain a single acre if you have nowhere to put the horse. The average is at least one acre per horse, with two being better. The only way to make one acre work is to have one horse and make sure the horse is not turned out on the grass all day and night.