I am very, very new to chickens - I'll completely admit. But I've kept tons of other birds before and have been around enough friends with chickens so I'm confident with my care of them. I picked up some pullets a week and 1 day ago. One of them was a smaller leghorn, probably a few days old. The others were a little older but they seemed to do fine together. The day before yesterday I picked up new day old chicks and had them under a lamp. I put the little leghorn with them for size purposes. This morning he was listless and laying on his side. I picked it up and he peeped and moved so I placed him under a lamp by himself. I thought it was dead after I did some chores outside, but when I went to toss him out he moved. It had a small amount of stuff coming out of his beak, it looked like food+water mixed up... I'm just not sure what to make of it. His neck is all the way back and he's on his way out, I was just wondering if I could prevent this from happening again. I've cleaned out all the bedding and bleached it, they're kept on newspaper and new horse hay cleaned daily so I don't think it was from contamination. If anyone has some words of wisdom I'm listening... I know I'll have some that die but it would be nice to know what happened. Thanks.