In this guide
Seeing your dog throw up is scary. The good news? Most causes of dog vomiting are fixable at home. This guide breaks down what triggers vomiting in dogs and how to help your pup bounce back fast.
What Are the Causes of Vomiting in Dogs?
Dog vomiting happens for many reasons. Some are minor. Others need a vet right away. Here’s what you need to know.
Eating Too Fast
When dogs gulp down food, air gets trapped in their stomach. This is one of the most common causes of dog vomiting after eating. You’ll see undigested food in the vomit.
Quick Fix: Use slow-feeders or puzzle-feeders. These bowls force your dog to eat at a safer pace.
Eating Grass
Dogs eat grass for various reasons. Sometimes they’re bored. Other times, an upset stomach drives them to it. When a dog eats too much grass, vomiting follows. You’ll notice green vomit from the plant material.
Quick Fix: Keep your pup engaged with toys and exercise. If grass eating becomes excessive, check with your vet.
Changing Food Too Fast
A sudden diet change upsets your dog’s digestive system. This is a common cause of dog vomiting after eating.
Quick Fix: Switch dog food gradually over 1–2 weeks or longer. Mix the new food with the old, slowly increasing the new portion each day.
Intestinal Worms
Worms in dogs are more common than you think. Puppies face higher worm risk, but adult dogs get them too. Signs of worms include diarrhea, weight loss, low energy, coughing, scooting butt on the floor, and itching or scratching.
Quick Fix: Visit your vet for deworming treatments. Keep your dog on preventatives year-round.
Viral Infections
Canine parvovirus and other viral infections cause severe vomiting. These illnesses hit hard and fast. Puppies are especially vulnerable.
Quick Fix: Get preventive care through vaccinations. If your dog shows symptoms, seek emergency veterinary hospital care immediately.
Eating Things They Shouldn’t
Dogs explore the world with their mouths. This means ingesting toys, inedible substances, and other dangerous items. Foreign object obstruction can be life-threatening.
Quick Fix: Prevent swallowing toy pieces by supervising play. Keep toxic household items away from pets, including alcohol, avocados, caffeine, chocolate, grapes, raisins, mothballs, antifreeze, paints, solvents, and rodent bait. Never give chicken and turkey bones, they splinter and cause serious damage.
Food Sensitivities and Allergies
Food intolerance or food allergies trigger chronic periodic vomiting. Your dog’s immune system reacts badly to certain ingredients.
Quick Fix: Work with your vet to identify problem foods. Switch to a limited ingredient or hypoallergenic diet.
Motion Sickness
Some dogs get carsick. Signs include whining, drooling, and yawning before vomiting starts.
Quick Fix: Take short trips first. Keep windows cracked for fresh air. Ask your vet about anti-nausea medication.
Pancreatitis
This painful condition causes severe vomiting, diarrhea, nausea, stomach pain, bloating, and reduced appetite. Fatty meat can trigger pancreatitis, making it a serious risk.
Quick Fix: Feed a low-fat diet. Avoid high-fat foods like peanut butter and eggs during recovery. Pancreatitis needs veterinary treatment.
Inflammatory Bowel Disease
IBD in dogs causes chronic vomiting and digestive problems. The esophagus, stomach, small intestine, or colon becomes inflamed.
Quick Fix: Your vet will prescribe special food and medication to manage symptoms.
Medication Side Effects
Some drugs cause vomiting as a side effect. Common culprits include Meloxicam (Metacam), Rifampin (Rifadin), Furosemide (Lasix), Metronidazole (Flagyl), Trilostane (Vetoryl), and Fluoxetine (Prozac, Reconcile).
Quick Fix: Never stop medication without asking your vet first. They can adjust the dose or switch to something gentler.
Serious Health Conditions
Several diseases cause vomiting:
- Heatstroke: Watch for excessive panting, drooling, inability to stand, increased heart rate, dry nose, and weakness. This is an emergency.
- Liver disease: Causes ongoing digestive issues
- Kidney disease or kidney failure: You’ll see increased thirst and urination, bad breath, and vomiting
- Addison’s disease: Low cortisol and aldosterone levels cause vomiting and lethargy
- Stroke: Balance issues and head tilt accompany vomiting
- Gastric motility disorders: Delayed gastric emptying keeps food in the stomach too long
Why Do Dogs Vomit? Reading the Signs
The color and content of vomit tell you a lot.
Yellow vomit contains bile from an empty stomach. The cause of dogs vomiting yellow liquid is usually that your dog hasn’t eaten in a while, and bile irritates the stomach lining.
White foamy vomit is mucous from the esophagus, often from vomiting on an empty stomach. The cause of dog vomiting white foam is typically an empty stomach combined with excess mucous production.
Bloody vomit signals ulcers in the stomach or esophagus, or a clotting disorder from rat bait poisoning.
Green vomit means your dog ate grass or plant material.
Reasons Dogs Vomit: When to Worry
A single episode of vomiting isn’t usually serious. But watch for these red flags:
- Multiple episodes of vomiting
- Vomiting more than once within 24 hours
- Vomit more than once a week
- Lethargy
- Loss of appetite
- Not drinking water
- Developing diarrhea along with vomiting
- Unexplained weight loss
- Fever
These signs mean your nauseous pup needs professional help. Don’t wait.
Quick Fixes That Actually Work
For mild vomiting without warning signs, try these first aid steps:
- Withhold food for about 12 hours. This lets the stomach rest. Exception: Don’t withhold food from puppies or diabetic dogs, they need regular meals.
- Provide small amounts of water. Offer just a few laps at a time. Small portions of water prevent re-vomiting and fight dehydration from vomiting.
- Start a bland diet. After 12 hours, offer boiled chicken and white rice. Feed small meals every few hours for 24–48 hours.
- Return to normal food gradually. Mix regular food back in slowly over several days.
Medical Treatment Options
For persistent vomiting, vets often prescribe Cerenia (maropitant citrate), an antiemetic medication for dogs. It comes as an injection or pill and stops nausea fast.
Your vet might need to run tests for a proper diagnosis of vomiting causes. This GI workup checks for gastric obstruction, clotting disorder, and other serious problems.
Prevention Is Key
Stop vomiting before it starts:
- Keep up with annual and senior checkups
- Stay current on vaccinations and deworming
- Store toxic foods and items safely
- Supervise playtime to prevent toy accidents
- Use slow-feeders for fast eaters
- Transition food gradually over 1–2 weeks
When to Call for Help
If you suspect toxic ingestion, call the pet poison hotline immediately. While telehealth vet services exist, they have limits. A veterinarian-client-patient relationship (VCPR) and in-person exam are often needed for diagnosis and treatment.
Don’t gamble with your dog’s health. When causes of dog vomiting blood appear, or when vomiting won’t stop, head to an emergency vet. Trust your gut, you know your dog best.
Your pup depends on you to keep them safe and healthy. Now you know the causes, warning signs, and fixes that work. Act fast when needed, and your dog will thank you with tail wags and wet kisses.
