If you read my posts above, you see that I'm at least considering doing something kinda' crazy but on the good foot, the new birds, "should I decide to accept this mission" are the same type and age so they can be kept in the same grow-out pens. I hope you don't mind me asking questions about your projects? I wonder why you get CXs and Pioneers? I know they are both meat birds that grow at what must be dramatically different speeds but it does seem a bit redundant or perhaps over kill. I know that all chicks stink if you don't keep right on the cleaning. I kept my dark Cornish on news papers for about two weeks (easy to get) but that got old fast! We ran the used papers through the mulcher/shreader on the mulch pile but they really began to stink fast while they were under the chicks. Things got so much easier when we finally put them on shavings!!!!!It helps me greatly that my wife does the feeding. My daughter helps collect eggs and my son is always eager to help round up any loose birds!
The rainbow layers are in a PVC chicken tractor which I built a couple of weeks ago. I want to build a better one that for the NH's. After only 2 days the CX's and Pioneers are stinking up the house. I changed newspaper yesterday but that didn't help much. Also, the laundry room where they are being kept is getting some remodeling done which is a spur of the moment thing. I would eventually like to put the meat birds in another tractor but we'll see how much I can get done. I'm kinda wishing I never got those hatchery rainbow layers.....I just don't need them.
Sorry..getting disjointed here...I have seen the Cornish Xs a few times but only in those large houses. I'm afraid I just couldn't deal with what appears to be a breed of chicken that is born to be early cripples and drop manure like a B-52 bomber.
You seem to have it under control! I'm still in awe of your work and efforts.