I opened my eggs today. 12 were fully developed, several had pecked through the membrane but not pipped through the shell. They had a layer of jelly like substance over them...? One chick was very deformed. Hydro/anocepholy (complete brain exposed, only one eye, beak messed up) and one chick was still alive, but not completely developed...? What did I do wrong? I had 12 hatch, 9 of which lived, 14 with chicks that did not hatch, and 11 undeveloped.