They have been laying since November or so. so not too long. My cochin that is coming out of molt is the one that is laying the soft shell eggs. I figure her system needs to get back on track. Thats why I gave them some oyster shells yesterday with their ration of afternoon scratch. It looks like this hen decided to eat it all.Is she a new layer? we have noticed this on eggs from new layers, but it usually goes away after a few eggs.