Q. My dog is not eating, and has lost a lot of weight. He has diarrhea with black stools some of the time not often. He throws up sometimes.
DR. ANDREA M. BRODIE, DVM
A. Black stool, not eating and diarrhea is a sign of severe gastrointestinal disease. This could be a bleeding ulcer, hemorrhagic gastroenteritis, pancreatitis and other causes of bleeding into the gut or even a tumor. This is likely painful as well. Please have your dog examined by a veterinarian. He will likely want to do blood tests, maybe a pancreatitis test (CpLI) and/or radiographs.
DAVID ELBEZE, DVM, MRCVS
A. Black stools is a sign of bleeding in the stomach or small intestines. This can be a very serious condition (ulcer, foreign body, tumor).
I recommend going to the vet as soon as possible, he will probably need to do a blood test and possibly an x-ray.
DESTINI R. HOLLOWAY, DVM
A. This sounds like your pet could use a really good work-up. Black stool can be a sign of blood in the stool and this needs to be looked into and treated appropriately. I notice that you have a standard poodle that is of senior age. He is at risk for several diseases that can affect his GI tract and cause serious illness and even death if not treated properly, so I encourage you to take him in for the best care possible and hopefully they can pinpoint the problem and start treatment right away.