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Understanding dog vomiting: causes, treatments, and prevention.

Understand why your dog is throwing up. Get insights into the causes, effective treatments, and prevention tips for dog vomiting to ensure your pet's health and well-being.

Talk to one of our vets online and ask your questions.


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Why is my dog throwing up?

Vomiting in dogs is a common issue that can stem from a variety of causes. As a pet owner, it's essential to understand the possible reasons behind this unsettling symptom. This section aims to shed light on why your dog may be throwing up, helping you discern when it's a minor issue and when it's time to seek veterinary attention.

Lazy Brown Dog

What are the common causes of dog vomiting?

1. Infections

Viral or bacterial infections can upset your dog's stomach.

2. Parasites

Intestinal worms can lead to digestive issues.

3. Food

Some dogs may have adverse reactions to certain foods or sudden diet changes.

4. Medications

Certain medications can cause stomach upset as a side effect.

5. Toxins

Ingestion of toxic substances, like certain plants, household cleaners, or human foods

What does different vomit colour mean?

My dog is throwing up yellow vomit

Yellow vomit usually contains bile, a digestive fluid. This often occurs when a dog's stomach is empty and is more common in the morning or after a long period without eating.

My dog is throwing up white and foamy vomit

White, foamy vomit can be a sign of gas build-up in the stomach. This is often related to indigestion or eating something that disagrees with their stomach. It can also indicate bloat in more severe cases, which is a medical emergency.

My dog is throwing up clean and liquid vomit

Clear, liquid vomit is generally water or saliva. It may indicate mild stomach upset, especially if your dog has been drinking a lot of water or drooling excessively.

My dog is throwing up mucus-like vomit

Mucus in vomit can be a sign of inflammation in the stomach or esophagus. This might happen if your dog has swallowed something irritating or has a gastrointestinal disease.

My dog is throwing up blood vomit

Blood in vomit (hematemesis) is a serious concern. The vomit might look red or like coffee grounds. This can indicate bleeding in the stomach or upper intestine and requires immediate veterinary attention.

My dog is throwing up brown vomit

Brown vomit can sometimes look like fecal material, especially if it has a foul odor. This could indicate a severe blockage or other serious gastrointestinal issues.

My dog is throwing up green vomit

Green vomit might indicate that your dog has eaten grass or has bile in their vomit. Eating grass can be a sign of nausea or digestive distress.

My dog has worms in vomit

Worms in vomit are a clear sign of a parasitic infection. Commonly, these are roundworms. Veterinary treatment is necessary to eliminate these parasites.

My dog has grass in vomit

Dogs often eat grass when they have an upset stomach. The grass can irritate the stomach lining and induce vomiting, which is the dog's way of trying to relieve their discomfort.

What's the difference between vomiting and regurgitation?



Vomiting is an active process. It involves the forceful expulsion of the contents of the stomach and upper intestine.


Before vomiting, dogs often show signs of nausea like drooling, licking lips, and restlessness.


There is noticeable heaving and retching. The dog's abdominal muscles contract to expel the contents.


Vomit usually contains partially digested food and can include bile (yellow or greenish liquid). It may also contain foam or mucus.


Causes: Dietary indiscretion (eating something they shouldn’t), Infections (bacterial, viral), Intestinal parasites, Toxic substances, Gastrointestinal diseases and Systemic illnesses



Definition: Regurgitation is a passive process. It involves the expulsion of undigested food or other substances from the esophagus, the tube that connects the throat to the stomach.


No Preceding Signs: Usually, there are no signs of nausea. It happens suddenly, often surprising the dog as well.


No Abdominal Effort: There’s little to no effort involved. The contents seem to just 'fall out' of the mouth.


Contents: Regurgitated material is undigested food that may be tubular in shape, mirroring the esophagus.


Causes: Esophageal disorders (like megaesophagus), Congenital esophageal abnormalities, Swallowing difficulties (due to foreign bodies, pain) and Certain neurological disorders


How long does it take for a dog to stop vomiting?

The duration for which a dog continues to vomit can vary greatly depending on the underlying cause. Here's a general overview:

  1. Mild Cases (e.g., Dietary Indiscretion): If the vomiting is due to a minor stomach upset, perhaps from eating something unusual but not harmful, it might stop within 24 to 48 hours.

  2. Moderate Issues (e.g., Infections, Food Intolerances): In cases of infections or food intolerances, the vomiting might last a few days to a week, especially if the dog needs time to respond to medications or dietary changes.

  3. Severe Cases (e.g., Chronic Illnesses, Toxins): For more severe causes like ingestion of toxins, gastrointestinal diseases, or chronic illnesses, the duration of vomiting can be variable and potentially prolonged. These cases require veterinary intervention for specific treatment, and the vomiting should subside as the underlying condition is managed.

  4. Continued Vomiting Despite Treatment: If a dog continues to vomit for more than 48 hours, even after initial treatment or dietary changes, it's important to consult a veterinarian. Persistent vomiting can lead to dehydration, electrolyte imbalances, and other complications.

  5. Resolution of Symptoms: Once the underlying cause of the vomiting is treated or resolves, you should notice a gradual decrease in the frequency of vomiting episodes. Complete cessation of vomiting might take a few days even after effective treatment starts.

How do I know if my dog is OK after throwing up?

Determining if your dog is okay after a vomiting episode involves observing their overall behavior and physical condition. Here are key signs to help you assess your dog's wellbeing:

  1. Behavioral Normalcy: If your dog resumes their normal activities, such as playing, interacting, and showing interest in their surroundings, it's a good sign they are feeling better.

  2. Appetite: A return of appetite is a positive indicator. However, reintroduce food gradually, starting with a bland diet, and monitor for any further vomiting.

  3. Hydration: Ensure your dog is drinking water and staying hydrated. If they are drinking normally and not vomiting the water back up, that's a good sign.

  4. Normal Bowel Movements: Keep an eye on their stool. Normal, solid bowel movements suggest their digestive system is functioning properly.

  5. No Further Vomiting: If your dog does not vomit again, especially over the next 24-48 hours, it's a positive sign.

  6. Energy Levels: Observe their energy levels. If they seem active and not lethargic, it's a good indication that they are recovering.

  7. Gum Color: Check their gum color. Normal, pink gums (not pale or white) are a sign of good circulation and health.

  8. No Other Symptoms: The absence of other concerning symptoms like diarrhea, lethargy, or signs of pain (like whimpering or reluctance to move) is important.

  9. Normal Breathing: Ensure their breathing is normal, not labored or excessively rapid.

  10. Body Language: Dogs often communicate discomfort through their body language. Look for signs of relaxation and contentment, as opposed to pain or distress.

Dog Collar

When should you be concerned about your dog throwing up?

1. Frequent Vomiting

If your dog is vomiting multiple times in a day, or over consecutive days, it's a cause for concern.

2. Vomiting Blood

Blood in the vomit, which may look like red streaks or have a coffee-ground appearance, is a serious symptom that needs immediate attention.

3. Diarrhea

Concurrent vomiting and diarrhea can quickly lead to dehydration, especially in puppies and older dogs.

4. Dehydration

Look for symptoms like a dry nose, dry or sticky gums, and lethargy. Dehydrated pets may also have sunken eyes and a lack of skin elasticity.

5. Lethargy

If your dog is unusually tired, weak, or unresponsive, it could indicate a serious underlying health issue.

6. Retching

Especially concerning in large breed dogs, this can be a sign of bloat, a life-threatening condition where the stomach dilates and sometimes twists.

7. Toxic Substances

If you believe your dog has ingested something toxic (such as certain foods, plants, or chemicals), immediate veterinary care is critical.

8. Foreign Objects

If you notice pieces of toys, bones, or other foreign objects in the vomit, your dog may have an obstruction in their gastrointestinal tract.

9. Change in Behavior

Changes in behavior, including decreased appetite or increased aggression, combined with vomiting, can be a sign of pain or discomfort.

10. Severe Pain

If your dog's abdomen is swollen or they react painfully when you touch their stomach, it could be a sign of a serious problem.

11. Other Symptoms

In cats, urinary blockages are common, while dogs may suffer from conditions like bloat.

When is a dog vomiting an emergency?

1. Vomiting Blood

2. Signs of Bloat

3. Suspected Poisoning

4. Severe Diarrhea

5. Older Dogs

6. Foreign Object

7. Unproductive Vomiting

8. History of Health Problems

What can I give my dog for vomiting?

If your dog is experiencing vomiting, there are some steps you can take to help manage their discomfort. However, it's essential to remember that these are general guidelines and you should consult with your veterinarian before giving any treatment, especially if the vomiting is severe, persistent, or accompanied by other symptoms.

  1. Fasting: Temporarily withholding food (but not water) can give your dog's stomach a chance to rest. This fasting period usually lasts 12 to 24 hours. Afterward, introduce bland food gradually.

  2. Bland Diet: After the fasting period, offer a bland diet consisting of boiled white rice and boiled, plain chicken or lean meat in small portions. Gradually reintroduce their regular food over a few days.

  3. Hydration: Ensure your dog stays hydrated. Offer small amounts of water frequently or ice cubes to lick, especially if they keep vomiting after drinking water.

  4. Probiotics: Probiotics designed for dogs can help restore gut flora, which can be beneficial after episodes of vomiting, especially if it was related to gastrointestinal upset.

  5. Over-the-Counter Medications: Some veterinarians may recommend over-the-counter medications like Pepcid AC (famotidine) or Prilosec (omeprazole) for certain cases. However, it's crucial to consult your vet for the appropriate dose and to confirm whether these are suitable for your dog.

  6. Avoid Human Medications: Never give your dog medication meant for humans, like aspirin, ibuprofen, or Tylenol, as these can be toxic to dogs.

  7. Ginger: In some cases, a small amount of ginger can help with nausea. It can be given in the form of ginger tea or a ginger capsule, but again, consult with your vet first.

  8. Prescription Medications: For more severe or persistent cases, your vet may prescribe antiemetic drugs to control vomiting.


How to prevent some cases of dog vomiting?








Maintain a Consistent Diet

Avoid Human Food

Regular Parasite Control

Avoid Overfeeding

Sudden changes in diet can upset your dog's stomach. If you need to change their food, do it gradually over several days by mixing the new food with the old.

Many human foods, including chocolate, grapes, onions, garlic, and xylitol (found in sugar-free gum), are toxic to dogs. Keep these out of reach and educate your family about what your dog can and cannot eat.

Keep up with regular deworming and flea prevention, as parasites are a common cause of vomiting. It's also wise to get pet insurance in case of an emergency.

Overeating can cause vomiting. Feed your dog measured amounts of food and avoid leaving food out for free-feeding.

How many times should a dog throw up before going to vet?

Single Episode of Vomiting: If your dog vomits once but otherwise appears healthy, is behaving normally, and shows no other concerning symptoms, you can typically monitor them at home. Multiple Episodes in a Short Period: If your dog vomits several times in a day or has repeated episodes over a short period (like several hours), it's advisable to contact your vet.

Vomiting Over Multiple Days: Even if the vomiting is not continuous but occurs over several days, you should consult your veterinarian.


Accompanying Symptoms: Regardless of the number of vomiting episodes, if your dog shows other symptoms such as diarrhea, lethargy, a loss of appetite, signs of pain, or any unusual behavior, a vet visit is warranted.

  • Is pet insurance worth it?
    Pet insurance is a valuable safety net, covering unexpected medical expenses. It provides peace of mind, ensuring your pet gets necessary care. It's especially beneficial for pets prone to health issues or accidents.
  • What is the cost of pet insurance?
    The cost depends on factors like your pet's age, breed, and coverage level. Basic plans are more budget-friendly but offer limited coverage. Premium plans cost more but provide comprehensive protection.
  • What pet insurance do vets recommend?
    Vets typically recommend comprehensive policies covering accidents, illnesses, and routine care. They suggest looking for plans with good coverage for chronic conditions. It's also advised to check for policies with minimal exclusions.
  • What does pet insurance cover?
    Accidents: Injuries and emergency treatments. Illnesses: From minor sickness to chronic diseases. Routine Care: Some policies include wellness visits and vaccinations.
  • Pros and cons of pet insurance
    Pros: Financial safety net for unexpected costs. Access to necessary treatments. Peace of mind for pet owners. Cons: Monthly premiums can add up. Exclusions like pre-existing conditions. Potential deductibles and co-pays.
  • Who has the best pet insurance?
    The best pet insurance varies based on individual needs. It's recommended to compare policies for coverage, exclusions, and customer reviews. Look for a balance of cost, coverage, and customer service reputation.
  • Which pet insurance that covers everything?
    No pet insurance covers 'everything,' but comprehensive plans come closest. They typically cover accidents, illnesses, and some wellness procedures. Always check for exclusions like pre-existing conditions and routine care limits.
  • How much is a vet visit for a dog without insurance?
    Costs can range widely, from basic consultation fees to hundreds for complex treatments. Emergency visits or surgeries without insurance can be particularly costly. Prices vary based on the procedure and location of the clinic.
  • What is a good annual limit for pet insurance UK?
    A good annual limit depends on your pet's potential health needs. In the UK, limits typically range from £1,000 to over £15,000. Higher limits offer more coverage but come with higher premiums.
  • Do vets charge more if you have insurance?
    Vets generally charge the same rates regardless of insurance status. Insurance helps owners afford more comprehensive care. It's more about coverage than cost differential at the vet.
  • What’s third party liability pet insurance?
    This covers costs if your pet causes injury to a person or damage to property. It's particularly important for dog owners. This insurance is a safeguard against legal liabilities.
  • How do vaccinations affect pet insurance?
    Keeping vaccinations up to date can lower pet insurance premiums. It reflects responsible pet ownership and preventive health care. Some insurers require up-to-date vaccinations for coverage.
  • What’s co-insurance or co-payment?
    Co-insurance is the percentage of a claim you pay after the excess is deducted. It's a way to share the cost of care between the insurer and the pet owner. Higher co-insurance can mean lower premiums.
  • Why are pedigree animals more expensive to insure?
    Pedigree pets often have a higher risk of inherited health conditions. They may also have higher value, increasing insurance costs. Insurers consider these factors when determining premiums.
  • Does my address matter for my pet insurance price?
    Yes, your location can affect insurance costs. Areas with higher vet fees typically have higher premiums. The risk of theft or straying can also vary by location.
  • Will property be covered if my pet damages it?
    Pet insurance usually doesn't cover damage to your own property. Third-party liability can cover damage your pet causes to others' property. Check your policy for specific exclusions.
  • Does pet insurance cover ‘cherry eye’ in dogs?
    Many insurers cover ‘cherry eye’ treatment if it's not pre-existing. Coverage depends on the specific policy and insurer. Always check for breed-specific condition exclusions.
  • Does pet insurance cover BOAS surgery?
    Coverage for BOAS (Brachycephalic Obstructive Airway Syndrome) surgery varies. Some insurers cover it if it’s not a pre-existing condition. It's important to check your policy's specifics.
  • How does my pet’s age affect pet insurance?
    Older pets often have higher insurance premiums. They are more likely to develop health issues. Age can also affect the availability of certain coverages.
  • Do I need to pay an excess for pet insurance?
    Most pet insurance policies require paying an excess. The excess is the amount paid out-of-pocket before insurance covers the rest. Choosing a higher excess can lower premiums.
  • Does pet insurance include kennel or cattery fees?
    Some policies cover kennel or cattery fees if the owner is hospitalised. This coverage is typically part of a more comprehensive plan. Always check the policy details for such benefits.
  • Can I get cover that starts immediately?
    Some insurers offer immediate cover for accidents. Illness coverage often has a waiting period. Check with your insurer for specific start times of coverage.
  • Is it better to pay for insurance annually or monthly?
    Paying annually can sometimes offer a discount. Monthly payments provide easier budgeting. Compare options to see which suits your financial situation best.
  • What should I do if my pet goes missing?
    Notify your insurer as many provide assistance for lost pets. Check if your policy includes advertising or reward costs. Also, inform local vets and animal shelters.
  • Will pet insurance cover life-threatening injuries or illness?
    Most pet insurance policies cover life-threatening conditions. This includes emergency surgeries and critical care. Check your policy for any limitations or exclusions.

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