Diarrhea is an important symptom of an underlying health problem; it is not a disease in itself. When a dog is suffering from diarrhea, it is a sign that something is wrong in the gastrointestinal tract as fecal matter rapidly moves through the digestive passages and there is passage of soft, watery stools that are unformed.
Some cases of diarrhea are triggered by minor digestive distractions brought about by eating people food or getting into the trash. However, diarrhea can also be triggered by more serious problems, like illness or poisoning. There are instances when diarrhea can come on quickly, be severe, and resolve on its own. Or it may happen gradually and stay for a long time. Affected dogs often suffer from intestinal cramps and abdominal pain. They are also nauseous and depressed. Dehydration is also an important consequence. Unless the underlying reason/s for diarrhea is identified and resolved, fatal consequences may occur.