My biggest concern is that it looks way too small for 6 birds. Minimum recommended specs is 4sq ft of floor space, 10sq ft of run, 1 ft of roost length, and 1sq ft of permanent ventilation per bird. More is always preferable. For 6 hens you really need at least 24sq ft in the coop, and remember you can't count any space taken up by nest boxes, feeders or waterers. Yes, even if they're free range. There may be reasons your chickens won't go outside such as weather or predators. And when that happens, because it will happen, you will probably see behavioral problems if you have less than the minimum recommended space.
