I'm trying to decide the best way to house two separate aged groups of chooks with the least amoutn of stress and upheaval for them, and I just can't decide, so I thought I'd put my lists up here and get some feedback from those who know better than I do. My present setup is this: Coop 1 is a small coop/run combination I got from Ebay with an open floor, one roosting pole and two nest boxes. The coop itself isn't predator proof because it's not on level ground so there are plenty of gaps under it, but the run is fairly safe, the feeder is rodent proof and we don't have to deal with 'coons here, only cats and dogs, perhaps foxes (heard of, but never seen in our side of town, and there are quite a few people with chickens around here), and of course the Australian Possum (will eat eggs and grains and vege scraps, but not live birds) and rodents. It's already home to my two chickens, I can fit three adult birds at a pinch because they only use it to sleep and lay eggs - the attached run is plenty big enough for the maximum of 6 fowl that our laws allow us to keep. The run is not what I would consider sanitary for new chicks, in that there may be worm eggs, lice etc from the wild birds that roost in the trees overhead, plus we recently lost a chook to a random respiratory disease. The other two are fine, but since I don't know what it was, I don't know if there might be something left of it in their environment. I considered putting hardware cloth as flooring for predator proofing and relocating it elsewhere on our land to a more level site, and pretty much using it as a tractor for the newbies until they get too big for it, so they can have access to grass through the wire floor. The sleeping/nestin bit is only slightly raised so the ramp up is an easy grade and the roosts are all low. Coop 2 is being built. It's big, new, fully predator proof. No known existing pathogens or potential health threats to newbies. The down side is that it's at the far end of our yard (within sight of the house, but not enough to see if anything is going on in there) and, being designed for adult chooks, the ramp leads up to a waist heigh coop, and the roosts are all going to be at an adult height. The chicks won't have access to green grass in there (I let the older girls free range when I can because they're big enough not to be easy fodder for my cat). So... can anyone give me some guidance on whether it would be better to relocate the big girls into the new coop and let the new chicks have the smaller one until they're too big for it... or is is better to start the newbies in the new coop and move the big girls in once they're all closer in size? (Either way the newbies will be in the house for the first 4 - 6 weeks. It's Summer here and plenty warm enough to let them out after that).