I don't know if anyone else can make it out better, but I can barely see a shadow of a difference, I just can't make it out. It doesn't seem yellow, and it doesn't look like anything unless it's uneven shed. A closer picture in better lighting would help, but I don't think she has Y.F.
Thanks...i am just trying to rule everything out..fecals clean,blood work good..I may have to face the fact she is just getting up there in age and egg laying every season isn't making her any younger.