Does anyone know why a hen would lay shell-less eggs regularly? If I am home and can check the nest boxes to collect mid-day, I can get the "egg in a bag", but if I am working it gets broken open and eaten (as evidenced by yolk on the other eggs or shavings). I don't like this because I feel it is teaching the hens to cannibalize the eggs. I understand that sometimes the egg doesn't stay long enough for the calcium to be laid down properly, but why would this happen on a regular basis? Some times it will almost have a real shell, but break easily. Usually it's just a membrane with egg inside. I feed layer food and provide supplemental oyster shell. The other hens are laying eggs with nice thick shells.