Vomiting and diarrhea are common reasons dogs visit the veterinarian. Sometimes a brief upset stomach is the cause; other times it is a foreign object, toxin, pancreatitis, infection, or illness elsewhere in the body. The pattern and the dog’s overall behavior matter more than any single symptom.
Vomiting versus regurgitation
Vomiting usually includes nausea, retching, and abdominal contractions. Regurgitation is more passive: food or liquid comes back up without the forceful effort of vomiting. Tell your veterinarian which you observe, because the list of possible causes differs. A video can help when it is safe to take one.
Diarrhea, appetite loss, and abdominal pain
Loose stools can follow diet changes, parasites, infection, and many other conditions. Note the frequency, color, whether there is blood, and whether the dog can drink normally. Refusing food can be a sign of pain or nausea. A dog that repeatedly stretches with chest down and hindquarters up, cries when touched, or has a distended belly needs veterinary assessment.
Emergency red flags
Go to an emergency clinic for unproductive retching with a swollen abdomen, suspected poisoning, collapse, repeated vomiting with inability to keep water down, or severe abdominal pain. These can point to dangerous problems, including gastric dilatation-volvulus (bloat) or intestinal obstruction. Blood in vomit or stool, especially with lethargy, also warrants urgent care.
When to call for a nonemergency appointment
Arrange evaluation when symptoms persist, recur, or are accompanied by weight loss, poor appetite, or reduced activity. Puppies, seniors, and dogs with chronic disease can become dehydrated more quickly. A veterinarian may suggest fecal testing, bloodwork, or imaging depending on the history.
Safe steps while seeking advice
Keep fresh water available unless the vet provides a specific fluid plan; don’t force fluids into a vomiting dog. Avoid human anti-diarrhea medicines, NSAIDs, and leftover antibiotics. If the dog may have swallowed a toy, string, bone, or other object, do not try to push it through with food.
Related reading: how GI problems are treated and stomach pain signs. Sources: Merck Veterinary Manual: vomiting in dogs and stomach and intestinal disorders.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.