What Happened to My Chick? GRAPHIC
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Is the head tucked under the left wing? When reading about quail there was a note that head position should be under the right wing. Anything else was abnormal, and could be caused by a variety of things. Perhaps this holds true for chicks as well?
My suggestion as an unseasoned poultry farmer would be to research causes for abnormal embryo development, and think very objectively about my processes.