I think it just means she’s not eating enough. What are her other symptoms? Is she losing body condition? You can tell by feeling her breast muscle. If she swollen at all in her belly… beneath her vent in between her legs? Is her crop functioning properly… emptying overnight? Is she a laying hen? If so, when was the last time she laid eggs? How old is she? Could she be heading into molt?
She feels skinnier than she should be. She does feel bloated in the abdomen. Her crop empties, but she doesn’t eat very much. She’s over 3 years old, a Swedish flower hen I hatched myself. I’m really not sure when she last laid. Her eggs look a lot like one of my other hen’s.