So I have an egg question, I think my 2 young fav pullets have started laying, one is 21 weeks and the other 22-23 weeks old both eggs I found today were off the roosts and neither had any shell form just the membrane, last saturday someone laid what appeared to be just a broken yolk on the patio and a few days before that I had an egg laid that had a paper thin shell also laid off the roost. I give them free access to oyster shell and they are all on the 16% layer feed. I didn't have any weak shelled issues with my other pullets that are over 7 months old. and not sure what to do to help the newer girls develop healthy egg shells?