NOT a myth!!!! We have a local chick whisperer that learned this from a Chinese woman years ago and she has over 95% accuracy in sexing in a feed store selling many thousands of chicks per year.
Found egg 3/4 out. Cloaca dried and stuck to egg. Tried soaking and lube. Couldn’t get egg to loosen and then it broke. Cloaca had 2.mm of tissue still attached to egg pieces. Cut them out. She healed up great in two days. Perfectly normal but no eggs since ( more than a month ago). Will she...