My 15 month old Cochin has an abnormal soft swelling below her vent, seems fluid filled. See photo after bath. She used to be an awesome egg layer all summer long, but stopped - due to molt I guess for about at least 3 weeks now. She is in a severe molt with some bare spots. She has been dewormed regularly, latest 2 weeks ago with Ivermectin pour-on and again 2 days ago, even though I did not see any ectoparasites or endoparasites. Poor thing is just skin and bones. I thought it was because of molting, but now I think it is related to the swelling. She is not herself. I did check her for egg binding, but I am pretty sure it is not. She used to have diarrhea a few days ago, better now after giving her crumble w/yoghurt, apple sauce, drinks water with ACV and/or Vitamins/Electrolytes. To get all my girls through the molt easier I added some protein with a handful of cat food every 2 days for 9 girls or a handful of Calf Manna. Does that look like an internal layer to all you experts, Gumboro disease, Lymphoid Leukosis or just me being paranoid? Any other idea?