My Dog Is Throwing Up Blood and Pooping Blood: What to Do
If your dog is vomiting blood and passing bloody stool at the same time, this is a medical emergency. Here is what the symptoms mean, the most likely causes, and exactly what you need to do in the next few minutes.
Finding blood in your dog's vomit and stool is one of the most frightening experiences a dog owner can face. It is also one of the clearest signals your dog's body sends that something is seriously wrong. Blood appearing in both directions — from the stomach and from the intestines — means the problem is likely widespread within the digestive tract or that the dog has lost a significant amount of blood overall.
This guide explains what the different appearances of blood mean, the conditions most likely to cause this combination, the steps you must take immediately, and what to expect at the veterinary clinic. It is not a substitute for professional veterinary care. If your dog is vomiting blood and passing bloody stool, call your veterinarian or the nearest emergency animal hospital right away.
Emergency Red Flags — Go to the Vet Immediately If Your Dog:
• Is vomiting blood or passing large amounts of bloody stool
• Has pale, white, or blue gums
• Is weak, collapsing, or cannot stand
• Has a distended or painful abdomen
• Is a puppy, a senior, or a small breed
• May have eaten poison, a foreign object, or human medication
• Is vomiting repeatedly and cannot keep water down
Is This an Emergency?
Yes. Vomiting blood combined with bloody stool is always considered an emergency. Either symptom alone deserves a prompt call to the vet. Both together suggest ongoing bleeding and a high risk of rapid deterioration from dehydration, blood loss, and shock.
Some dogs with mild gastrointestinal upset may have a small streak of blood in stool and appear otherwise normal. That situation can sometimes wait a few hours for a same-day appointment. But when blood appears in vomit as well — especially repeated vomiting or more than a faint streak — the balance shifts sharply toward emergency care. Do not wait to "see how it goes." Call ahead so the clinic can prepare for your arrival.
Estimating Severity From the Blood's Appearance
- Bright red blood in vomit: Usually indicates active bleeding in the stomach or upper small intestine. Can be caused by ulcers, irritation, or a bleeding disorder.
- Coffee-ground vomit: Dark, granular material that looks like coffee grounds is partially digested blood. It suggests bleeding that has been present for a while and is often a sign of more significant blood loss.
- Bright red blood in stool (hematochezia): Usually points to bleeding in the lower intestine or colon. Common with colitis, parasites, and hemorrhagic gastroenteritis.
- Black, tarry stool (melena): Digested blood from the upper digestive tract. Often indicates more serious or prolonged bleeding. Tarry stool is a classic warning sign of internal bleeding.
You may also see related symptoms such as throwing up yellow bile with blood or throwing up white foam with blood. Each presentation deserves veterinary attention, but the combination of blood in both vomit and stool is especially urgent.
What Blood in Vomit and Stool Means
Blood can enter the digestive tract in several ways: from inflamed or eroded tissue in the stomach or intestines, from a bleeding ulcer, from damaged blood vessels, from a clotting disorder, or because the dog swallowed blood from the respiratory tract or mouth. When blood exits from both the top and the bottom of the digestive system, the vet will consider the entire gastrointestinal tract as a possible source.
The volume and speed of the bleeding matter more than the exact color. A dog that loses blood rapidly can go into shock before you notice large amounts of blood. That is why gum color, energy level, and breathing rate are just as important as what you see in the bowl or on the floor.
Check the Gums: Lift your dog's lip and look at the gum color. Healthy gums are pink and moist. Pale, white, grey, or blue gums mean reduced circulation and possible blood loss. Press a finger on the gum until it blanches, then release; if color takes more than two seconds to return, seek emergency care immediately.
Most Likely Causes
A veterinarian will work through a differential diagnosis based on your dog's age, vaccination status, diet history, and possible exposure to toxins. These are the most common causes of simultaneous bloody vomiting and bloody diarrhea.
Hemorrhagic Gastroenteritis (HGE)
HGE is one of the most frequent causes of sudden bloody vomiting and diarrhea in adult dogs, especially small and toy breeds. It develops rapidly, often within hours. The stool classically becomes loose, bloody, and jelly-like. The dog may be lethargic and dehydrated but is often still alert. HGE is serious because severe fluid loss can lead to shock, but it is also highly treatable with prompt veterinary care, typically intravenous fluids and supportive medication.
Parvovirus
Parvovirus is a life-threatening viral infection that attacks the intestinal lining, causing bloody diarrhea, vomiting, and severe dehydration. It is most dangerous in unvaccinated puppies, but unvaccinated adult dogs can also be affected. A dog with parvovirus often has a distinct odor to the stool and becomes progressively weaker. Parvovirus requires immediate hospitalization and intensive supportive care. Vaccination is the single most effective protection.
Poisoning and Toxins
Rodenticides (rat poison) are a common cause of internal bleeding in dogs. Anticoagulant rodenticides interfere with clotting and can lead to blood in vomit, stool, urine, and even the gums. Other toxins that can irritate the GI tract or cause bleeding include certain plants, human medications such as NSAIDs, and household chemicals. If you suspect any toxin exposure, tell the vet immediately — antidotes exist for some poisons and time matters.
Foreign Body Obstruction
A swallowed toy, bone fragment, corn cob, string, or other object can irritate or perforate the intestinal wall, causing bleeding in both directions. Obstructions often cause repeated vomiting, abdominal pain, and a refusal to eat. Some objects pass, but many require surgery or endoscopic removal. Never induce vomiting unless a vet instructs you to.
Infectious Enteritis
Bacterial infections such as Salmonella, Campylobacter, and Clostridium, as well as viral infections other than parvo, can inflame the intestinal lining and cause bloody diarrhea and vomiting. These are sometimes linked to contaminated food or raw diets. Diagnosis requires a fecal culture or PCR testing.
Intestinal Parasites
Severe hookworm or whipworm infestations can cause bloody stools, and heavy parasite burdens can lead to anemia and vomiting. Puppies are especially vulnerable. Regular deworming and fecal exams are important preventive measures.
Ulcers and Inflammatory Bowel Disease
Stomach or intestinal ulcers can bleed into the digestive tract, and chronic inflammatory bowel disease can cause ongoing irritation and blood loss. These conditions are more common in older dogs or dogs on long-term medications such as steroids or NSAIDs. A vet may recommend endoscopy or biopsy.
Less Common Causes
Clotting disorders, liver disease, cancer of the digestive tract, and severe allergic reactions can also cause blood in vomit and stool. Age and breed influence the likelihood of each. Your vet will use bloodwork, imaging, and history to narrow the list.
Other serious symptom combinations, such as throwing up with diarrhea containing blood or pooping blood and throwing up foam, share many of the same causes and should be treated with the same urgency.
What to Do Right Now
Your immediate actions can make a real difference in your dog's outcome. Follow these steps in order.
- Call your veterinarian or an emergency clinic immediately. Describe exactly what you see — the color of the blood, the amount, how many times your dog has vomited, and whether the stool is bloody or black and tarry. Ask whether you should come in right away.
- Do not give any human medication. Never give ibuprofen, aspirin, acetaminophen, Pepto-Bismol, or human anti-diarrheal drugs. Many are toxic to dogs and can worsen bleeding or cause organ damage.
- Do not force food or water if your dog is actively vomiting. Repeated vomiting means the stomach needs rest. Offer only small amounts of water if your dog is not vomiting, and never force liquids into the mouth.
- Keep your dog calm and warm. Blood loss and dehydration can cause a drop in body temperature. Wrap your dog in a light blanket and keep activity minimal while you prepare to travel.
- Collect a stool sample and take a photo of the vomit. Bring a fresh stool sample in a sealed bag or container. A photo of the vomit helps the vet assess the blood's appearance.
- Gather important information. Note when symptoms started, how often they occur, any possible toxin exposure, all medications and supplements your dog takes, and your dog's vaccination history.
- Do not induce vomiting unless a vet tells you to. If your dog swallowed a foreign object or poison, inducing vomiting can cause additional injury, especially with sharp objects or caustic substances.
Helpful Items to Bring to the Vet:
• A fresh stool sample in a sealed container
• A photo of the bloody vomit
• A list of all medications and supplements
• Information about possible toxin exposure
• Vaccination records if you have them
• Your dog's food and treat brand names
What the Vet Will Do
At the clinic, the veterinarian will first assess your dog's stability. This includes checking gum color, heart rate, hydration, temperature, and abdominal comfort. If your dog is in shock or severely dehydrated, treatment will begin before diagnostics are finished.
Diagnostic Tests
- Physical examination: Palpation of the abdomen, gum assessment, and overall condition scoring.
- Complete blood count (CBC): Checks for anemia, infection, and platelet abnormalities that could explain bleeding.
- Blood chemistry panel: Evaluates liver, kidney, and electrolyte status, and helps rule out systemic disease.
- Fecal examination and PCR: Identifies parasites and bacterial or viral pathogens, including parvovirus.
- Coagulation panel: Tests clotting function, especially if rodenticide poisoning is suspected.
- Abdominal X-rays or ultrasound: Looks for foreign bodies, obstruction, intussusception, or tumors.
- Parvovirus test: A rapid in-clinic test for puppies and unvaccinated dogs.
Depending on the findings, your vet may recommend additional tests such as endoscopy, biopsy, or a blood transfusion cross-match. Early diagnostics shorten the path to the right treatment and improve the prognosis.
Treatment & Recovery
Treatment is tailored to the underlying cause, but most dogs with bloody vomiting and diarrhea receive supportive care first.
- Intravenous fluids: The cornerstone of treatment for dehydration and shock. Fluids restore circulation and help stabilize the dog quickly.
- Anti-nausea and gastroprotectant medications: Reduce vomiting and protect the stomach lining so the digestive tract can heal.
- Antibiotics: Used when a bacterial infection is confirmed or strongly suspected.
- Antidotes and decontamination: For poisoning cases, including vitamin K for anticoagulant rodenticide and activated charcoal when appropriate.
- Surgery or endoscopy: Required for foreign body removal or to treat certain obstructions and ulcers.
- Blood transfusion: Considered in severe anemia or major blood loss.
- Hospitalization and monitoring: Severe cases need close monitoring of hydration, electrolytes, and blood values until stable.
Recovery at Home: Once your dog is stable and eating again, your vet may recommend a bland, easily digestible diet for several days, gradually transitioning back to regular food. Follow all medication instructions exactly, monitor stool and vomit for any return of blood, and keep stress low. If symptoms recur, call your vet immediately rather than waiting.
Preventing Future Episodes
While not every cause of bloody vomiting and diarrhea is preventable, several practical steps dramatically reduce the risk.
- Keep vaccinations current. Parvovirus vaccination is essential for puppies and all unvaccinated dogs.
- Use year-round parasite prevention. Regular deworming and monthly flea, tick, and heartworm prevention reduce the risk of parasite-related bleeding and other diseases.
- Secure all toxins. Store rodenticides, cleaning products, human medications, and toxic foods out of reach. Learn which foods are dangerous, including chocolate, grapes, raisins, onions, and xylitol.
- Manage chew toys and objects. Choose appropriately sized toys and supervise chew time to prevent foreign body ingestion.
- Feed a consistent, high-quality diet. Sudden diet changes can trigger GI upset. Transition foods gradually and avoid table scraps that can irritate the gut.
- Schedule routine wellness exams. Regular checkups help catch ulcers, dental disease, and other conditions before they cause serious bleeding.
If your dog has had a previous episode of bloody diarrhea while acting normal or a bit of blood in the stool, mention it to your vet at the next visit. Recurrent minor bleeding can sometimes be an early warning of a larger problem.
Frequently Asked Questions
The Bottom Line
Blood in both vomit and stool is never something to watch and wait on. Call your veterinarian or an emergency animal hospital immediately, bring a stool sample and a photo of the vomit, and avoid all human medications. With fast veterinary care, many causes of bloody vomiting and diarrhea are treatable, and early intervention greatly improves the outcome. Keep your dog's bloody diarrhea and vomiting with blood in the stool history in mind for future vet visits, and prioritize vaccination and parasite prevention to reduce risk.
