My chickens just started laying. My EE started about 2 1/2 weeks ago at 22 weeks, my Polish/Silkie mutt started about 1 1/2 weeks ago at 24 weeks, and my Speckled Sussex started off today with a shell-less egg at 28 weeks. Ever since my EE started, I have gotten 2 eggs intact. And she lays every day! I have gotten 2 from my polish, both pretty and intact, but she has stopped laying. Now my Sussex finally started and all I found was a brown membrane. I always find a crushed shell or just a membrane from my EE. Whenever it's a shell, the shell seems like just a thin sheet around the egg. I normally find these in the nest box in the puddle of yolk and whites it made or I find the shell or membrane kicked out of the nest box but find the yolk and whites in the nest box. I feed them Purina Layena and oyster shell. I also cook up all the button quail eggs I get from a week of collecting and feed it to them weekly if my button cooperates. What's wrong with them? Am I doing something wrong?