Why Is My Dog Vomiting and Not Eating? Causes and What to Do
Last updated: October 22, 2026. This article is general information for pet owners, not veterinary advice. If your pet seems sick, or you are unsure, call your veterinarian. Key takeaways One episode of vomiting in a dog that still acts normal is often not an emergency, but repeated vomiting, blood, weakness or a swollen belly needs a vet right away. Contact your vet if vomiting lasts beyond about 6 to 12 hours (VCA) or more than 24 hours (Cornell), or if your dog is lethargic, feverish or has a painful belly. Cold paws alone do not diagnose anything, but cool limbs together with pale gums, weakness or collapse can be signs of shock. That is an emergency. Do not give human medicines or try to treat a sick dog at home without your vet’s advice. When your dog vomits, refuses food and seems unwell, it is natural to worry. Some causes are minor, but others are serious. This guide, based on veterinary sources, explains the common causes, the warning signs that mean you should not wait and w...