By The Breed-to-Bowl Team | Breed-to-Bowl
Why Is My Dog Vomiting? Common Causes and What to Do
Vomiting is one of the most common reasons dogs are rushed to the vet — but not every vomiting episode is an emergency. Here's how to tell the difference and what to do.
🚨 Call the Vet Immediately If Your Dog:
- Is retching but cannot bring anything up (possible bloat or obstruction)
- Has a bloated or hard stomach
- Has bloody vomit
- Is vomiting more than 3–4 times in one hour
- Is also not responding normally, collapsed, or very weak
- May have eaten something toxic or foreign (wipes, socks, medication)
- Is a puppy or elderly dog — they dehydrate faster
Finding your dog vomiting is never a nice sight — and it's natural to panic. But before you rush to the emergency vet, it helps to understand that dogs vomit for a very wide range of reasons, from completely harmless to genuinely serious.
The key is knowing which category your dog's vomiting falls into.
Common (Usually Non-Emergency) Causes
🌿 Eating Grass
Dogs eat grass for a variety of reasons — sometimes to deliberately make themselves vomit when their stomach feels off, and sometimes just because they like it. Occasional grass-eating and vomiting is generally not a concern. If your dog does it constantly, it may signal an underlying digestive issue worth investigating.
🍖 Eating Too Fast
Dogs who inhale their food can vomit shortly after eating — often bringing up barely-digested food. This is known as regurgitation rather than vomiting. A slow-feeder bowl or spreading food on a lick mat can completely solve this. It's very common in food-motivated breeds like Labradors and Beagles.
🔄 Dietary Change
Switching foods too quickly — even to a healthier diet — can cause vomiting as the gut microbiome adjusts. Always transition over 7–10 days, gradually mixing more new food with less old food each day. This is true for switching to homemade food as much as switching between commercial brands.
🤢 Eating Something They Shouldn't
Dogs eat things that don't agree with them — garbage, dirt, dead animals, another pet's food. A single vomiting episode after a "dietary indiscretion" often resolves on its own. The concern is when they've eaten something toxic or something that could cause a blockage.
🚗 Motion Sickness
Some dogs get carsick, especially puppies. If your dog consistently vomits in the car, talk to your vet about anti-nausea medication for travel, or try feeding them 2–3 hours before travel and keeping the car well-ventilated.
🌅 Morning Nausea ("Bilious Vomiting Syndrome")
Some dogs vomit yellow or white frothy bile first thing in the morning when their stomach has been empty overnight. This is called Bilious Vomiting Syndrome and is common in dogs who go a long time between meals. The fix is simple: give a small snack before bed to prevent the stomach sitting empty overnight.
More Serious Causes That Need Veterinary Attention
🧲 Eating a Foreign Object (Obstruction)
Socks, wet wipes, toys, corn cobs, bones — any of these can get lodged in the stomach or intestine and cause a blockage. Signs include repeated retching without producing vomit, a hard or swollen belly, and complete loss of appetite. This is a surgical emergency.
☠️ Poisoning or Toxic Ingestion
Vomiting after eating something toxic (medications, household chemicals, certain plants, xylitol, chocolate, grapes) requires immediate vet attention. Don't wait to see if it gets better — call the vet or Animal Poisons Helpline the moment you suspect poisoning.
🫀 Bloat (GDV)
Gastric Dilatation-Volvulus (GDV) is a life-threatening emergency most common in large, deep-chested breeds like German Shepherds, Rottweilers, Great Danes, and Boxers. Signs include unproductive retching, a visibly swollen belly, and rapid deterioration. Call an emergency vet immediately — GDV kills within hours without treatment.
🔬 Underlying Medical Conditions
Chronic or recurring vomiting can be a sign of conditions including pancreatitis, kidney disease, liver disease, Addison's disease, inflammatory bowel disease, or cancer. If your dog vomits regularly — even mildly — this always warrants a vet investigation.
Vomiting vs Regurgitation — What's the Difference?
These are two different things and it's worth distinguishing them:
- Vomiting involves abdominal heaving and effort. Food from the stomach comes up, often partially digested, and your dog will look and act like they feel sick before and after.
- Regurgitation is passive — food or liquid just comes up without effort, often immediately after eating. It looks like a tube-shaped blob of undigested food. This is more likely to signal oesophageal issues or eating too fast.
What to Do When Your Dog Vomits
- Stay calm and observe — note how many times they vomited, what it looked like, and what your dog may have eaten recently
- Check for red flags from the emergency list above — if any apply, call the vet now
- Withhold food for 2–4 hours but keep fresh water available to prevent dehydration
- Offer a bland meal after the fasting period — boiled chicken and white rice in a small amount
- Monitor closely — if vomiting resumes, persists beyond 24 hours, or your dog deteriorates, see the vet
💡 The 24-Hour Rule: A dog who vomits once or twice and then seems totally normal — eating, drinking, playing, tail wagging — has almost certainly just eaten something that didn't agree with them. A dog who vomits repeatedly, seems unwell, or stops eating for more than 24 hours needs veterinary attention.
Support Your Dog's Recovery with the Right Food
After a vomiting episode, a bland homemade diet helps the stomach heal. Our chicken and rice recipe is perfect for recovery.
View the Recovery Recipe →