Having looked at it I think it would be fine for bantams, we have large fowl (warrens, olive eggers and three pure breeds) at our orchard in a 4m x 4m run with free ranging access most days to our orchard. At home we have pekin bantams (not the best layers but there are bantams with a better laying record!) who are in an open run in our fox-proof garden as if they are let out they trash the place. They have perches and enrichment within the coop and run and are handled daily as well, I also put them to work weeding the driveway sometimes, under supervision because of neighbourhood cats. 😂