I’m sorry that you are going through this with CarolAnne! I have an almost 3 yr. old Rouen with similar issues, although she can go for stretches where she seems ok. Her symptoms only started this fall when the weather started changing. On her bad days, I worry that she isn’t going to make it through. On her good days, she is 100% normal.
I brought her to the vet in the beginning and am anxiously waiting for her recheck appointment. They did not think she had an infection at the time, and that stress from the sudden changes in weather and the decreasing daylight hours could be contributing, although the vet did say that reproductive problems are common in aging birds that have been bred for maximum egg production. I’ve been treating her with wam baths and oral calcium gluconate when she has flare-ups. I did have some very helpful suggestions from other members in my thread “reproductive illness”.
Salpingitis and cancer have been mentioned as possible diagnoses for Daphne (cancer seems unlikely in Daphne’s case as her symptoms are more of a reoccurring type rather than degenerative).
Definitely look up “egg yolk peritonitis” as it is one of the most dangerous possibilities that require instant action.
Please keep us updated on CarolAnnes condition. I wish her the best.