I have an almost 2 year old buff Orpington who has always been a good layer. On Friday she laid a normal egg late morning but then by evening was lethargic and refused food (she NEVER refuses food). A couple hours later she laid an egg with no shell, just the membrane, and no yolk. Pictures are attached. The egg white wasn’t even in the membrane. She has perked up but has a pale comb and hasn’t laid since. It’s been two days. She has gone in the box like she wants to, but doesn’t lay.