Hello there, New to BYC, thanks for having me. First time chicken mom, received two hens from a friend, he told me they were approximately nine months old when I got them three months ago. I have what I believe to be a Production Red (Lucy) that lays a light cream colored egg and a Rhode Island Red (Ethel) that lays a darker brownish egg. He told me he had Leghorns and Rhode Island Reds. (When I first got them we averaged 13 eggs a week between the two). My problem is with the Rhode Island Red. For the third time in the last month she has gone two days in a row without laying an egg. On the third day she lays one normally formed egg and one with about half of a formed shell and the yolk and white just sitting there without the formed shell around it. So one completely wasted egg. She has always had very weak shells, despite trying Purina Premium Layena crumbles (lots of additives, I told the guy at the feed store about the weak shells). Switching to this Premium food has made no difference in shell strength. Missing two days in a row and the day three problem is new since the food switch. Thank you in advance for any help or advice you can give.