I found a dead chick the other morning (almost 5 week old Welsummer) and didn't know why it died until today. We just moved our chicks from the brooder to the outside coop yesterday. They finally all came out into the run late today but only 3 Anconas found their way back into the coop at dusk. The others (about 35 chicks of different breeds) had all bunched up in one corner of the run. I was in a near panic as it was obvious there were chicks piled on top of chicks so I banged against the enclosure and yelled my head off until they broke up. Sure enough, one Welsummer was laying on the ground in the same position I'd found the dead chick a few days ago. He was still breathing and finally shook it off and got up but I think a few more minutes and he'd been gone. My husband crawled into the run and handed all the chicks either out to me to put in the coop or put them thru their door himself. Now I have one more stupid chicken thing to worry about.