Ok az, I am stumped.....about 2 weeks ago I hatched out a batch of eggs. Some were local, a few we're some trader joes fertile eggs, and some of my own backyard mixes. I had 30 chicks hatch. All but 1 late one thrived, and were doing fine. 2 days ago 2 chicks were gasping for air. Their crops were empty, and 15 minutes after I noticed them gasping, the flopped around violently and died. The same happened with one this morning. All other chicks seem fine. No gasping, eating and drinking well, and clean butts, no diarrhea . I am stumped. These were not weak chicks. They were not skinny, or lethargic. Temp was good in brooder, so I don't think it was heat related. I have another batch of eggs in the bator and am terrified that I have something dangerous happening here. Any help is greatly appreciated.