I have two hens, a Black Australorp and a Rhode Island Red, who are just over 2 years old and who have been laying very watery eggs for the past few months. They lay pretty regularly and the exterior of the eggs appear normal, although just this past week the Australorp's eggs have had slight wrinkles or ridges; she's also lost some feathers on her underside. There was a period last year where her belly was bare for months until we treated with DE. Again I've treated the hens and coop with DE in case of mites. As for the Rhode Island Red, she is a rescue hen who just joined the flock four or five months ago; before she arrived, we had no watery egg problems. Her eggs are jumbo sized with shells a bit on the thin side. I don't believe her eggs were watery initially, but that this change occurred within a few months of her being here. I've changed their feed in case of nutritional deficiencies. There are no outward indications they have infectious bronchitis (no sneezing, coughing, etc.) My third hen, also a Rhode Island Red, continues to lay firm, well-shaped eggs as usual. Can anyone recommend a course of action to correct this problem? Or is it possible that this is due to their age? It seems strangely coincidental that two hens of different breeds should suddenly start laying watery eggs, and I fear it's more likely that they do have some sort of infection they've passed on to one another. Thanks for any help.