One mixed breed hen, 2 1/2 years old, one of my best layers, started a hard molt about the first of September. She looks wonderful now, but for the last two weeks has been laying thin shelled eggs at night. Last night, a second hen, a cochin/silkie cross, also 2 1/2 years old who has been laying steadily though a slow molt also laid a thin walled egg last night. Two days ago she laid an egg with a normal shell but with a spot of blood inside. A third hen, 6 months old, was laying thin shelled eggs when she came into lay, but her eggs are now normal. Are these abnormal eggs the result of the stress of molting? I'm starting to really worry! All of my hens look very healthy. ( I have 9 more hens going through their molts now, one more coming into lay.) The coop is clean and free of parasites. I feed laying pellets, supplemented with mustard greens, chicory greens and soldier fly larvae, with cat food and dairy added for extra protein during molting. Mixed grains for snacks. I would appreciate any advice! I've researched thin shelled eggs online, and nothing I've read sounds like a match.