I used an extra large wire dog crate... took the tray out of the bottom and "shimmy-buried" the bottom of it underneath the run bedding. (I used the tray upside down like a lid ontop of the wire crate so no big girls could hop ontop and poop down onto the babies...) The run is covered, so they were safe from rain, etc (even though it was like a freaking drought at the time). I had hanging feed and waterers clipped to the crate. It was plenty warm out for them. I did have to put chicken wire around the bottom of the crate so they couldn't pop out and escape when they were small, haha. I let them grow up in the crate inside of the run until they were 6 weeks old and feathered out. The big girls would see them and be interacting with them but without being able to peck them. At 6 weeks, I set the babies free in the run and removed the crate. I did keep the smaller feed and waterer in a back corner away from the big containers incase the babies got bullied. However, the big girls didnt even react to them being free in the run at that point. They were so use to them they didn't even care. There is an occasional "get outta my way" peck but it is rare. The first night the babies were released from the crate... they followed the big girls up into the coop to roost. It went really well this way for me!