My little cochin chick died this evening. He has been fine.....eating, drinking, running around with the others. This evening I noticed one was laying on him so I tapped the glass and they all jumped up. He didn't have his eyes open so I took him out, dipped his beak in water, his little eyes popped open and he went to chirping. I put him down and he ran back to the other side and layed down. An hour later I went to check on him, and he was laying under a BR already dead. There have been no obvious signs of anything being wrong. All 7 have been running around peeping, eating, and drinking normally. Is it possible he was suffocated?