I just noticed today that one of my welsh harlequin hens has a 'dumpy butt'. Her lower abdomen area is almost dragging on the ground and she may be walking slower or more carefully to keep her hiney from dragging on the ground. I thought maybe she was egg bound so I caught her, but it is soft. It didn't seem to hurt her, and her vent looked normal. It almost looks like the fatty parts on adult female geese, but she's the only one of my hens that has this. The other three hens and the drake in her group are the same age (hached summer 2010 if I remember correctly), and the group of birds I hatched here this spring are also all normal looking.