Long story: About two weeks ago we bought an adult chicken because my son thought it was a pretty bird. It was also fairly sociable and didn't object to being picked up. We kept it in the cat carrier in the coop for two days, then let it out into the coop. The other chickens pretty much ignored it - there's enough space in the coop that the chickens can comfortably hang out on opposite ends and just stare at each other. I would let the birds out in the morning to the back yard and the flock, minus the new hen, would all run out and do their thing since they free range the yard. The food and water was outside the coop, and the chicken quickly figured it out and would eat the food and drink the water. Fast forward two weeks and I noticed the chicken wasn't on the roosting bars as normal, but sitting in the corner of the coop. I figured it was broody. I don't know if this bird was a layer or not by the time we got it. Second day I see the bird is in the same place so I pick the bird up to get the eggs, and put the bird down outside of the coop. I notice that the bird won't stand, and has a wobble trying to sit up. Brought the bird inside my house and put it in a crate with normal pine bedding with food and water. The bird ate a bit and drank a bit, but otherwise was laying out like the birds do when they're dust bathing. It doesn't want to stand up. It was panting, so I gave it cool water and my wife gave it a bath with a misting bottle. The bird isn't panting anymore but is laying down and still doesn't seem to want to keep any decent posture. These birds did get the cocci(?) vaccine. None of my other 9 birds are showing the same symptoms. I'm feeding the bird moistened medicated chick feed when it is eating. Ideas? Heat stroke? New bird blues? Sickness? How long do chickens typically stay sick?