I have 3 hens laying right now, 1 Buff Orp. and 2 buff Cochin Bantams. The B.O's eggs are large, brown and they crack much like store bought eggs. The Cochins' eggs are smaller and lighter brown and are a PAIN to crack, and often the shell will peel away from the membrane before I can get it broken enough to actually get it to crack! The hens are just getting the layer feed, and get the crushed egg shells about 1x a week. (whenever we cook eggs) I am not sure if this is normal for smaller eggs or if there is something up with the eggs? I don't think a chick would be able to hatch out of these eggs because the membrane is so tough! Any suggestions?