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?

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?