I have several Buff Orf. hens that are steady layers. The question I have is that the shells and membranes are rather tough when I crack them. Is this normal or something else ?? The quality of the eggs is fine. Just tough to crack open. The strange thing is an egg I cracked the other day that had a tiny egg with it's shell inside. An egg in an egg. I didn't break the tiny one to see if it had a yolk or anything. Ever seen this before ?? Merrie Christmas and Auld Lang Syne everyone !!!