I have an 11-day old jumbo Cornish cross chick who has been pulling his head up in between his wings so he looks like he has no neck (reminds me of a penguin). This has gone on at least two days. He has been less active than the others but not showing typical pneumonia symptoms (brown-ish feet, nodding off while standing, labored breathing...) I saw him eat some at around 2:00 today. Now he doesn't seem able to walk and is dropping his wings. His most recent dropping was just the white part an watery. I will try to upload a picture. Anyone know what this might be? I've isolated him inside with a heat lamp because he was getting trampled in the outdoor brooder, but my chicks have never liked being alone.