I have done searches and read a LOT about this, and I seem to have learned that it leads to peritonitis, which is usually caused by E coli, which will eventually kill the bird outside of an expensive surgery. Is that correct? I am asking because I have a RIR pullet (about 6 mo) who I believe is laying internally. She will lay in the nesting box, but get then she will get up and there will be no egg. She does this often. Also, she almost always has yellow fluid on her feathers under her vent. It sort of looks like yolk, though I cant be sure. She does not seem to be in pain, and I have not noticed a change in appetite, though I could be wrong. Diana, I have read the link that you posted a while back on, I believe the hen's name was Peggy and the owner's Maggie? It was very informational and I thank you. Do you think that my bird has the beginnings of peritonitis? Edit: She has also layed several soft shelled and shell-less eggs. Her abdomen does appear slightly distended, but not so much as to immediatly cause concern.