Our  younger Corgi who has never been very healthy, surviving an auto immune disease in her early years, now 7, blew up like a balloon with fluid in her belly , the vet couldnt see anything on xrays all a grey blur, they put her on meds to bring down swelling and pass fluids (somewhat uncontrollably), and to treat possible underlying infection, dropping from 42 lbs to 36 in 5 days

It was enough for the vet to do an ultrasound... Found nothing good. Liver heart and lungs all clear, but…