What's wrong with this bird? I'm raising 26 Jumbo Cornish Cross chicks for the first time, they are 7-weeks old. Butcher date is middle of next week. They already average about 8-9 pounds each. Always voracious at the feeders when it's feeding time - except for one, this afternoon. He refused the feeders, took a little water, but hid in the coop. I pulled him out twice to feed, and he just waddled back inside. His breathing is very labored, and intermittently he made sounds like a loud hiccup or a dog barking - I've never heard that sound from any of them. His comb and wattles are normal color (red). Is it butcher time a little early for this poor guy? Or does he just have the hiccups? FYI, I did clean out the coop this afternoon during the heat of the day - and forced the flock outside. it was about 89-degrees. They don't have much shade at this time of day, so they crowded into shady spots while I worked around them. I may have stressed them too much, I fear! I withheld their afternoon feed until the run was in shade, and that's when I noticed his distress.