Several months ago I had a RIR get suddenly fat. I guess it happened over the course of a few weeks. we started to noticed that she was waddling and she felt heavy. She eventually become unable to move properly. I tried to find out what was wrong and most agreed it was probably a tumor. I made her comfortable and made sure she was eating and drinking after 5 weeks she died. She was one of my oldest hens about 3 years+. Now I have a Barred rock with the same symptoms. She is the next oldest hen I have at 3 years. I noticed yesterday that she is waddling and her legs are farther apart then the others.. she stops to rest quite a bit. She feels heavy. She has a healthy appetite and is still moblie. They both lay irregularly since their last molt. What could be happening and can I save this one? ANy help is appreciated.