Just finished my hatch. Including bantams from my flock, and other large species from my friends flock. I noticed on the back of the neck of one, top of the head of another, shoulder of a third, and throat of a fourth (which did not live) ONE pea size cyst or blister..air or fluid filled.....not sure. Some of the afflicted were bantams other were large breeds. So it was not breed specific or flock specific. I asked my friend whom I TOTALLY TRUST, and he has never seen this before. I think I will wait to see if it is naturally absorbed by chic.....if not..I gotta think of the big picture. OH BTW all chics appear to be healthy and vigorous. Thanks in advance for everyones insight and advise.