Ugh same with my girl. 10 yo female developed diarrhea out of the blue seemingly about 2 1/2 months ago now. Vet has been treating as a pancreas issue. Similar to others in this thread. Just finished the B12 injections. He tried steroids also but she did not handle them well. Newest issue is severe fluid retention in her abdomen. She has lost a lot of muscle. Glad I thought to look here. I will share all I can but have no solution at this point.