Sigh....the poor bird. The ovary (actually the follicles) will also have apparent infection which has to be treated.
Can you post some more pix's front and side. I just do not see a hernia, and the skintone color is from yolk in the fluid in the abdomen.
The pix below is a collage I was working on. Their from past necropsys. In the top row is normal follicles of the Ovary but the hen died from egg-binding, and the other 2 are from hens that lad abnormal follicles and have apparent infection, and they also had peritonitis. The lower pix shows tissue that was touched with the tip of a needle while drawing out fluid to drain the abdomen, and shows mass infection.(my vet did that) This is why it is important to know whaere to draw fluid but to use the right antibiotics, such as pipercillin. Baytril does not really treat these type of infections in the follicles and internal injuries from drawing fliuds from the abdominal cavity.