I have 6 Australorps that are 5 months old. I got my first egg on July 31. I now have 2 laying almost everyday and a 3rd laying about every other. As you can see one of my 3 was a little odd today, but its the sound of it that concerns me, it sounds like ceramic. When I tap on it and compare it to tapping on another "normal" egg it has a very different sound. Any ideas on what might cause this or anyone else ever have this?