We have occasional eggs from one of our hens that look like an umbilical cord is attached. Most days, this hen lays normal-looking eggs. Hen seems fine health-wise. I've posted a picture at the bottom of my BYC page (because I've not understood yet how to post pics on the forum). Hens are on a commercial formula (Layena pellets) plus some free-ranging in the grass daily. For occasional treats they get things like dried mealworms, scrambled eggs with crushed shells, chopped tomatoes mixed with crushed oyster shells, and chopped cabbage, blueberries (not their favorite), watermelon/cantolope sprinkled with crushed oyster shells. The only treat they get just about every day is the mealworms-- just rattle the container & they'll come running from wherever they may be roaming! They do sometimes get into the jueveniles' Start & Grow mash. Any ideas would be appeciated! Thanks! -- I did get a picture posted a couple of posts down. Thanks!