Care guideEmergency
Vomiting and diarrhea
One vomit or loose poop in a bright, well dog can be watched at home. Call your vet if it goes on or it's a puppy, and go now for blood or bloating.
Get your dog to a vet as soon as you can
Find an emergency vetKey facts
- Verdict
- Care guide · Emergency: get help now
- Call your vet if
- Vomiting again and again, blood in the vomit, or bloody or black poop, retching with nothing coming up, or a swollen belly, diarrhea for more than a day, or any diarrhea in a puppy and not eating, low energy or a painful belly. All 8
- First step
- Call your vet now if you see any of the warning signs on this page, or if your puppy has diarrhea. All steps
- Sources
- PDSA, Merck Veterinary Manual, AKC. Reviewed 9 October 2026.
What to do
- Call your vet now if you see any of the warning signs on this page, or if your puppy has diarrhea.
- Go to a vet straight away for blood in the vomit or poop, retching with nothing coming up, a swollen belly, or weakness or collapse.
- If an adult dog has vomited once and is otherwise bright, let it rest at home and watch closely for more.
- Offer fresh water little and often through the day.
- Once the vomiting stops, give small, frequent meals of a bland food, such as plain boiled rice with cooked chicken breast, then switch back to normal food over two to three days.
- Call your vet if your dog keeps vomiting, still isn't right after 24 hours, or gets worse at any point.
- If a toy puppy is also weak, wobbly or very sleepy, it may have low blood sugar. Go to a vet now.
Don't
- Don't give human medicines, such as anti-diarrhea pills, unless your vet tells you to.
- Don't withhold food from a puppy, an old dog or a dog with another illness.
- Don't give rich or fatty food until your dog has fully recovered.
When to call your vet
- Vomiting again and again
- Blood in the vomit, or bloody or black poop
- Retching with nothing coming up, or a swollen belly
- Diarrhea for more than a day, or any diarrhea in a puppy
- Not eating, low energy or a painful belly
- Sticky gums or sunken eyes (dehydration)
- Weakness, confusion or collapse
- Your dog may have eaten something poisonous or swallowed an object
Why
Most cases are mild, but vomiting and diarrhea can also mean parvo, poisoning, a gut blockage or a twisted stomach. If it keeps going it can dehydrate a dog, and it's more serious in puppies.
Sources
- PDSA: Vomiting in Dogs
- PDSA: Diarrhoea in Dogs
- Merck Veterinary Manual: When to See a Veterinarian (table)
- AKC: What Constitutes a Veterinary Emergency?
Guide reviewed 9 October 2026. Page updated 7 November 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.