My Dog Is Throwing Up and Has Diarrhea with Blood

When your dog is throwing up and has diarrhea with blood, it's natural to feel worried and unsure what to do next. Blood in vomit or stool can be a sign of a minor dietary upset or a serious medical condition. The key is to stay calm, observe your dog's overall condition, and seek veterinary advice promptly. This guide will help you understand what might be happening and how to act in your dog's best interest.

Remember that this article is for informational purposes only and is not a substitute for professional veterinary care. If your dog is showing severe signs like weakness, collapse, or persistent vomiting, contact your vet or an emergency clinic right away. For general guidance on managing gastrointestinal upset, you can also review our related article on diarrhea and vomiting lasting several days.

Common Causes of Vomiting and Bloody Diarrhea

There are many reasons a dog might develop bloody diarrhea and vomiting. Some are mild and self-limiting, while others require urgent treatment. Below are the most common categories:

1. Dietary Indiscretion

Dogs often eat things they shouldn't — garbage, table scraps, spoiled food, or foreign objects. This can irritate the stomach and intestines, leading to vomiting and bloody diarrhea. If your dog recently got into the trash or ate something unusual, this may be the cause. However, even a dietary upset can become serious if it causes dehydration or if a foreign object causes a blockage. For mild cases, a bland diet and monitoring may be enough, but always consult your vet first.

2. Infections

Bacterial, viral, and parasitic infections can all cause bloody diarrhea and vomiting. Parvovirus is a serious viral infection that often affects puppies and unvaccinated dogs, causing severe bloody diarrhea, vomiting, and lethargy. Other infections include Salmonella, Campylobacter, and intestinal parasites like hookworms and whipworms. If your dog is not up to date on vaccinations, or has been exposed to other sick dogs, infection is a higher concern. For a detailed look at parvovirus, see our article on parvovirus in dogs.

3. Hemorrhagic Gastroenteritis (HGE)

HGE is a condition characterized by sudden onset of bloody diarrhea and vomiting, often in small or toy breeds. The exact cause is unknown, but it may be related to a bacterial toxin or food hypersensitivity. HGE can cause rapid dehydration and requires prompt veterinary attention. Dogs with HGE typically appear very ill and may have a distended abdomen.

4. Inflammatory Bowel Disease (IBD)

Chronic inflammation of the gastrointestinal tract can lead to intermittent vomiting, diarrhea, and blood in the stool. IBD is often a diagnosis of exclusion and may require a biopsy for confirmation. It is more common in middle-aged to older dogs and often managed with diet and medication.

5. Toxin Ingestion

Many household items and foods are toxic to dogs, including chocolate, grapes, onions, xylitol, and certain plants. Ingestion of these can cause severe gastrointestinal upset, including bloody vomiting and diarrhea. If you suspect your dog ate something toxic, contact your vet or a pet poison control hotline immediately.

6. Other Causes

Less common causes include ulcers, intestinal blockages, intussusception (telescoping of the intestine), and cancer. These conditions often require advanced diagnostics and specialized treatment.

When to Seek Emergency Veterinary Care

Not every case of bloody diarrhea is an emergency, but certain signs indicate that your dog needs immediate medical attention. Call your vet or an emergency clinic right away if you observe any of the following:

• Large amounts of blood in vomit or stool, or blood that persists after a few hours.
• Repeated vomiting — more than 2-3 times in a few hours, especially if your dog cannot keep water down.
• Lethargy, weakness, or collapse — your dog seems unusually tired, unresponsive, or unable to stand.
• Signs of pain — whining, panting, or a tense abdomen when touched.
• Pale gums — a sign of shock or internal bleeding.
• Your dog is a puppy, senior, or has a pre-existing health condition — these dogs are more vulnerable to dehydration and complications.
• Suspected toxin ingestion — even if your dog seems fine now, some toxins cause delayed symptoms.

When in doubt, it is always safer to call your vet for advice. They can help you determine whether you need to bring your dog in immediately or if you can monitor at home. For general guidance on managing vomiting and diarrhea, our article on what you can give a vomiting dog may be helpful, but always prioritize professional advice.

How Veterinarians Diagnose the Problem

When you bring your dog to the vet with vomiting and bloody diarrhea, the vet will start with a thorough physical examination and a detailed history. They will ask about your dog's diet, recent activities, vaccination status, and any known exposures. Diagnostic tests may include:

• Fecal examination: Checks for parasites, bacteria, and blood.
• Blood work: A complete blood count (CBC) and biochemistry panel to assess hydration, organ function, and look for signs of infection or inflammation.
• Parvovirus test: A quick in-house test if parvovirus is suspected.
• X-rays or ultrasound: To look for foreign objects, blockages, or abnormalities in the intestines.
• Endoscopy or biopsy: In chronic cases, to examine the lining of the stomach and intestines.

Based on the findings, your vet will recommend a treatment plan. Early diagnosis and appropriate treatment greatly improve the outcome, especially for conditions like HGE or parvovirus.

Treatment and Home Care

Treatment depends on the underlying cause and the severity of your dog's condition. Mild cases may be managed at home with veterinary guidance, while severe cases require hospitalization for intravenous fluids, medications, and monitoring.

At-Home Care (Only Under Veterinary Guidance)

If your vet determines that your dog can be treated at home, they will likely recommend:

• Withholding food for a short period (usually 12-24 hours) to rest the gastrointestinal tract, but always provide small amounts of water to prevent dehydration.
• Introducing a bland diet gradually after the fasting period. Boiled chicken and white rice are common choices. Your vet may also prescribe a therapeutic gastrointestinal diet.
• Medications as prescribed — these may include anti-nausea drugs, probiotics, or antibiotics if a bacterial infection is confirmed.
• Monitoring for dehydration — check your dog's gums and skin elasticity. If you gently pinch the skin on the back of the neck, it should snap back quickly. If it stays tented, your dog is dehydrated.
• Keeping your dog comfortable and rested — limit exercise and stress.

Veterinary Treatment

For more serious cases, your vet may administer:

• Intravenous fluids to correct dehydration and electrolyte imbalances.
• Anti-nausea and gastroprotectant medications to soothe the stomach and reduce vomiting.
• Antibiotics if a bacterial infection is identified.
• Pain relief if your dog is uncomfortable.
• Surgery if a foreign object or intussusception is present.

Hospitalization may be required for severe cases, especially for parvovirus or HGE. Your vet will keep you updated on your dog's progress.

Diet and Recovery: Helping Your Dog Heal

Once your dog is stable and ready to eat, a gradual return to normal food is important. Here's a typical recovery plan:

1. Start with small amounts of a bland diet. Offer 1-2 tablespoons of boiled chicken and rice every few hours. If your dog keeps it down, gradually increase the amount.
2. Transition back to regular food slowly. Over 3-5 days, mix increasing amounts of your dog's normal food with the bland diet until they are fully transitioned.
3. Avoid fatty, spicy, or rich foods during recovery. Also avoid treats unless they are part of the bland diet.
4. Ensure fresh water is always available. Dehydration is a major risk with vomiting and diarrhea.
5. Consider a probiotic supplement recommended by your vet to help restore healthy gut flora.

For specific dietary recommendations for dogs with sensitive stomachs, see our articles on best dog food for sensitive stomachs and wet food for small dogs with sensitive stomachs.

Prevention Tips

While not all cases of vomiting and bloody diarrhea can be prevented, you can reduce the risk by following these practices:

• Keep your dog up to date on vaccinations — especially parvovirus and distemper.
• Use year-round parasite prevention as recommended by your vet. See our guide on monthly flea, tick, and heartworm prevention.
• Supervise your dog outdoors to prevent scavenging and eating garbage.
• Keep toxic foods and household chemicals out of reach. Check our list of toxic foods for dogs.
• Transition to new foods gradually over 7-10 days to avoid digestive upset.
• Provide regular exercise and mental stimulation to reduce stress, which can contribute to digestive issues.

Frequently Asked Questions