First time poster! One of our hens has been a very good layer for us, being fairly regular. Recently, we noticed some interesting 'spots' or deposits on the shells. They are pretty small, round, in decent sized clusters, and are the same or lighter color of the shell itself. My wife, who is a vet student, thinks that it could be some kind of fungal infection, but we just aren't sure. It doesn't seem to be effecting her in any way, and the shells are pretty hard still. We just want to get some answers. Thanks!!!