We bought a 40-acre abandoned farm 4 years ago, and have been bringing it back to life slowly. We believe in putting our toes into the water to see how it feels before going in all the way. To that end, we bought 5 chickens of mixed breeds (RIR rooster, Ameraucana, Buff Orpington, and 2 Star hens) and a small coop in March of this year, and then expanded our flock to 7 guineas and 9 mixed-breed "mutt" chickens, of which three were roosters. The Buff Orpington went broody (much to our delight) and hatched and raised 4 peeps (so, they are RIR/Orp crosses). We decided we wanted more eggs, so I bought some more "mutts" from another backyard breeder, and now have 12 hens, 7 guineas, and one RIR rooster. On our property, we inherited two ancient chicken coops. Picture here is 4 years ago; we now use the smaller one for sheep and have fencing. The larger one has been used for storage and trash. We are building a newer storage/hay/horse barn now, and we'll be getting everything we care about out of this 1800 square foot coop by snowfall, God willing. The basic measurements of this building are 100 ft. X 18 ft. What I'm thinking of doing is expanding our chicken keeping to larger production in the good months, and then culling back in the winters, because this coop has no electric. (It does have a great spring box for water right next to it.) The building has a row of center posts that go down the center of it. It has five doors. It has tons of big windows, so GREAT ventilation. And, we COULD run electric to it if that ever would make sense. We could very easily subdivide the interior space into "breed specific" coops... but then how would we free range them? Maybe... if with two breeds, for instance, we could free range on alternate days? My central question arises from (probably confusion about) mixing breeds. I'd like to raise White Rocks and Black Austrolorpes, and I'd love for them to go broody, raise their own chicks, etc. OR go ahead and get an incubator so that we could perpetuate our flocks from here. Wouldn't I need, then, separate flocks to keep the breeds pure blooded? Like, White Rock roos & hens and Black Aus roos and hens... separated? Just not seeing how this would work, quite. Ideas? BTW: I don't think that we want to get into either egg or meat (or chick) production for the public. Rather, we have six adult kids who have families and friends, and we probably could have a hundred birds and get takers for all their meat and eggs ongoing.