Hello, I only have 2 hens at the moment - a Silkie and a Pekin bantam. They are 5 years old, hardly give me any eggs, and none at all in the winter, but they are lovely characters, and being small they don't destroy my garden when I let them out.
I wonder has anyone else ever had eggs with very thin shells? Yesterday one of them laid an egg with a paper thin shell, although today she laid a perfectly normal egg. Could it be a calcium deficiency? They have grit available, and get out into the garden most days.