To Effie Marie Hines concerning Loki: I'm sorry that Loki is going through this ordeal. I can't remember which type of cancer Loki has (I'm talking with so many people lately about ferrets with tumors). Animals with abdominal tumors often have fluid build up in their abdomens. The black stolls that you are seeing are most likely the result of gastric ulcers. We see ulcers in stressed mustelids very commonly. Normally, with proper care, relief of stress, and some protective antibiotics and coating agents, gastric ulcers can be overcome. HOwever, the chances of doing this in chronically ill animals is greatly reduced. Good luck with Loki, and keep us posted. Bruce Williams, DVM [log in to unmask] [Posted in FML issue 0657]