Okay ,I have yet to raise any meat variety of anything. Right now i have been culling extra roosters but I was thinking about getting some pekins and some colored rangers. Originally I was just going to let them free-range with the rest of my flock. But I got to thinking about building a chicken ark or tractor because my culled roosters are very lean and have little breast meat. They are mostly buff orp crosses and about 20 weeks old when culled. So I wouldn't expect much meat from them anyway since they seem to take at least 6 months to get any reasonable amount of breast meat. I feed my entire flock about once a day and they eat it all up real quick then forage and run around my 1 acre the rest of the day. They also get cracked corn and things like that. As I go in and out of the shed, I toss some out for them. Now I was wondering if keeping birds in closer quarters would make them bigger/meatier? Perhaps it's common sense since they are getting less exercise but then wouldn't they have more fat rather than more muscle? Anyone have any thoughts on this?