It's really 5 birds in the run, the Rangers don't stay in there except when everyone is locked up into the coop at night. Yes, I need them cooped--too much predator activity at night and my fences won't keep them out
BTW--if they were sitting in their own poo, I'd increase their space, so far they're fine. They aren't super huge at this point, I prefer slow growth over a quick meal.
BTW, again, 7x9' total space (they have full access to the run and the coop during the day) is 63sf or 6.3 per bird, should they actually all be in there. But since it's only the Cornish in there most of the time, it's really double that.
(sorry so scattered, still not off the first cup of coffee!)