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Dog Vomiting: When to Worry & What to Do

A practical guide to tell mild from serious — but when in doubt, always ask your vet.

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

CALL YOUR VET

Veterinary advice recommended today — For most cases, follow the home-care steps below and call your vet the same day if warning signs appear.

What it can look like

An occasional empty-stomach or grass-induced vomit can be normal for dogs, but repeated or forceful vomiting, or vomiting with other signs, should not be ignored.

Common triggers to consider

  • Ate something new, spoiled food or table scraps
  • Sudden diet change or eating too fast
  • Intestinal upset, parasites or infection
  • Swallowed a toxin or a foreign object — call poison control / vet right away if suspected

When to call your vet

Contact your vet if any of these apply:

  • Vomiting more than 2–3 times in a day or lasting over 24 hours
  • Blood in vomit or a swollen, painful belly
  • Lethargy, not eating, or repeated attempts to vomit with nothing coming up

What to do right now

Offer water in small amounts. Skip the next meal, then give a bland meal (plain boiled chicken and rice) in small portions. Do not force your dog to eat.

What the vet may do

Your vet may check for dehydration, infection, a foreign body or parasites, and may recommend fluids or anti-nausea treatment.

Common questions

When is dog or cat vomiting an emergency?

Call your vet or an emergency clinic the same day if there is blood, repeated vomiting for more than 24 hours, a painful or swollen belly, or if your pet also seems weak, wobbly or won’t eat.

Should I make my pet vomit at home?

No. Never induce vomiting unless your vet or a poison line tells you to. Some substances cause more damage coming back up, and home methods can be dangerous.

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Same symptom in Cat: see Cat Vomiting — causes and home care can differ by species.

This page is educational triage information, not a diagnosis. Pets vary — when in doubt, ask your vet. In an emergency, contact your local emergency clinic or pet poison hotline directly.