Why is my dog vomiting?
Vomiting in dogs is common and often resolves on its own within a day, most often caused by something eaten that did not agree with them or eating too quickly. It becomes urgent when it is repeated, forceful, contains blood, or comes with other symptoms such as lethargy or a swollen abdomen — any of those means ringing a vet rather than waiting to see.
Get this seen
This is worth a call to your vet rather than waiting to see how it goes, particularly if it has lasted more than a day or your pet is otherwise off-colour.
The short answer
A single episode of vomiting in a dog who is otherwise bright, drinking, and keen for their next meal is usually nothing serious, and often traces back to something eaten — a bit of rubbish on a walk, a rich treat, or simply eating too fast. It is the pattern around it, not the single event, that tells you how worried to be.
Vomiting that repeats within a short space of time, that looks forceful or projectile, or that happens alongside your dog seeming genuinely unwell is a different matter and should be treated as urgent rather than watched overnight.
Common causes
Dietary indiscretion — eating something they should not have, from bin contents to a dead bird on a walk — is one of the most frequent causes, and usually resolves within a day once whatever it was has passed through. A sudden change of food, or a rich new treat, can produce the same result, and so can simply overeating at one sitting.
Motion sickness in the car, mild infections, parasites, and eating too fast are all common and generally manageable causes. Less commonly, vomiting can be a sign of a blockage, poisoning, or an underlying illness affecting the kidneys, liver or pancreas, which is why persistent or severe vomiting always needs a vet's assessment rather than a guess at home. Stress, such as a house move or a stay in kennels, is another genuine trigger worth ruling out in an otherwise healthy dog.
Ring a vet now if…
Treat it as urgent if your dog vomits repeatedly within a few hours, if there is blood in the vomit (which can look red or like coffee grounds), if the abdomen looks swollen or your dog is trying unsuccessfully to vomit, or if they seem weak, collapsed, or in obvious pain.
Also ring promptly if you know or suspect your dog has eaten something toxic or a foreign object, if vomiting is paired with diarrhoea and your dog is a puppy or elderly, or if it continues beyond 24 hours even without other symptoms. Dogs, and puppies especially, can become dehydrated quickly.
What to do for a mild, one-off episode
For a single vomit in a dog who otherwise seems well, withholding food for a few hours while offering small amounts of water often lets the stomach settle. Reintroduce a small, plain meal after that rather than a full portion, and watch how they get on with it before going back to their normal amount the next day.
Do not give any human medication, and do not force your dog to eat if they are not interested. If a second episode follows, or your dog seems increasingly unwell rather than better, move straight to contacting a vet rather than continuing to wait it out.
What can help
A dog who bolts their food and vomits shortly after eating often does better with a slow feeder, which changes the pace of the meal rather than the food itself. A bland, easily digested recipe is also worth having in mind for a dog who is prone to an occasional unsettled stomach, alongside splitting one large meal into two smaller ones through the day.
None of this replaces getting a repeated or severe episode checked — these are sensible things to have for a dog who is otherwise well but occasionally sick, not a way to manage something that keeps happening.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.
Tarhong Concentric Circle Slow Feeder Bowl for Dogs & Cats
A stylish slow-feeder bowl that encourages healthier, calmer mealtimes — available in blue, grey, or white.
£14.99
Spherical Slow Feeder Licking Bowl
A spherical non-slip slow feeder that paces fast eaters and turns mealtimes into a calming licking ritual. The ridged surface slows gulping, aiding digestion and easing boredom for dogs and cats alike.
From£13.99
LickiMat Classics Food Enrichment Lick Mat for Cats & Dogs
Rubber lick mats that slow feeding, encourage calm, and keep cats and dogs happily entertained — freezer and microwave safe.
£10.99
Common questions
- When should I worry about my dog vomiting?
- Worry if vomiting repeats within a few hours, contains blood, is forceful or projectile, or comes with lethargy, a swollen abdomen, or your dog seeming genuinely unwell. A single mild episode in a bright, otherwise well dog is far less concerning than a repeating or worsening pattern.
- Should I feed my dog after they have vomited?
- Withhold food for a few hours after a single vomit, offering small amounts of water, then reintroduce a small, plain meal rather than a full portion. If a second episode follows or your dog seems unwell, speak to a vet before feeding again.
- Can I give my dog anything to settle their stomach?
- Avoid any human medication without a vet's advice, since several common ones are unsafe for dogs. Withholding food briefly and reintroducing a small, plain meal is the safest approach for a mild episode, and anything beyond that should come from your vet.
- Why does my dog vomit after eating too fast?
- Eating too quickly can cause a dog to bring food straight back up shortly after a meal, which looks like vomiting but is often closer to regurgitation. A slow feeder or puzzle-style bowl that slows the meal down is a straightforward way to reduce how often this happens.
- Is vomiting bile in the morning something to worry about?
- Vomiting a small amount of yellow bile first thing, especially on an empty stomach overnight, is common and often resolves with a slightly earlier or later last meal of the day. If it happens regularly or your dog seems unwell alongside it, mention it to your vet rather than assuming it will simply pass on its own.
Related
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Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.