Hi, I'm having the same issue. I currently have 3 Rhode island reds and one Wyondotte. The Reds arentlaying for some reason, melting is long past, but the Wyondotte is. However, for about 2 months now, every egg she lays has this same hole, but always on the top of the egg. I used to think it was because she was packing at it after laying it, but not I'm just flat out confused. Feeding 16% layer pellets. They're only 16 months old, and with it being July right now, I'm sure it's not because of too little amount of sun (as far as the Reds go).