Dog Throwing Up Something That Looks Like Poop

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-10-03

If your dog is throwing up something that looks like poop, the color and smell usually come from digested blood, intestinal contents backing up behind a blockage, or vomit mixed with stool your dog ate. A dog throwing up looks like poop is not a normal event, and brown or fecal-smelling vomit deserves a call to your veterinarian the same day. This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

• Brown, dark, or fecal-smelling vomit is not normal stomach contents and needs same-day veterinary attention.
• The two most common explanations are a gastrointestinal obstruction and coprophagia (eating poop), which can also cause vomiting.
• Vomiting is an active, forceful process with retching and abdominal contractions, which is different from regurgitation [1].
• Do not induce vomiting unless your veterinarian tells you to, because some causes make emesis dangerous.
• Bring a photo or sample of the vomit and note the time, color, smell, and whether your dog is still eating and drinking.

What This Sign Looks Like and What Normal Vomit Looks Like

Normal dog vomit usually contains recognizable food, bile (yellow or green fluid), foam, or saliva. It may smell sour or like the food your dog ate. It often comes up shortly after eating or on an empty stomach in the early morning.

Vomit that resembles feces is different. It may be brown, dark brown, or gray-brown. It may smell like stool. It may contain material that looks like digested food mixed with dark debris. Some owners describe it as "fecal matter" or say the vomit looks like feces.

Vomiting itself is the forceful ejection of stomach and upper small intestine contents. It is usually preceded by nausea, drooling, retching, and strong contractions of the abdominal muscles and diaphragm [1]. That effort is one way to tell vomiting apart from regurgitation, which is passive and does not involve abdominal contractions. Regurgitated food often looks undigested and may keep a cylindrical shape from the esophagus [1].

If your dog brings up material with no effort, that is more likely regurgitation. If your dog heaves, drools, and contracts the belly muscles, that is vomiting. Both can be serious, but the brown, fecal look points more toward vomiting with intestinal contents or digested blood.

Why Dog Vomit Can Look Like Poop

Obstruction and Why Contents Back Up

A blockage in the stomach or small intestine can stop food, fluid, and debris from moving forward. Pressure builds. The stomach and upper intestine can then push material back up, and that material may look brown and smell like stool.

Foreign bodies are a common cause. Dogs have swallowed kinetic sand, skewers, popsicle sticks, toys, and other objects that can lodge in the intestine. In one reported case, an 11-year-old dog developed a small intestinal obstruction after eating kinetic sand, and surgery was needed to remove it [2]. In another case, a 5-year-old dog had acute vomiting and anorexia from obstructive small intestinal foreign material, and the problem progressed to a segmental jejunal volvulus with abdominal bleeding [3]. Skewer and popsicle stick ingestion is also common, and a study of 114 dogs found that these objects can perforate the gastrointestinal tract [4].

When a dog vomits brown material, obstruction is one of the first things your veterinarian will consider. The vomit may contain intestinal contents that cannot pass normally.

Coprophagia (Eating Poop)

Coprophagia means eating feces. Some dogs eat their own stool or another animal's stool. If your dog ate poop and then vomited soon after, the vomit can contain recognizable stool or smell like it. This is one of the more straightforward reasons a dog's vomit looks like feces.

Coprophagia is common in dogs and often behavioral, but it can also be linked to digestive problems, parasites, or poor digestion. If your dog eats poop often and vomits, it is worth a veterinary visit to rule out underlying issues. You can read more about this pattern in Dog Eating Poop and Vomiting: Is It Dangerous?.

Digested Blood

Blood that has been in the stomach or upper intestine for a while turns dark brown or black, like coffee grounds. This is called digested blood. It can make vomit look brown or fecal. Causes include stomach ulcers, bleeding tumors, severe inflammation, and swallowed blood from the mouth or nose.

Digested blood in vomit is a red flag. It can mean ongoing bleeding, and it needs prompt veterinary evaluation.

Other Causes of Brown Vomit

Not every brown vomit means obstruction. Other possibilities include:

• Severe gastroenteritis with bile and food mixed together
• Pancreatitis, which can cause vomiting and abdominal pain
• Liver or kidney disease, which can cause vomiting and nausea [1]
• Ingestion of irritating substances or poisons [1]
• Nervous system disorders that trigger vomiting [1]

Vomiting can be caused by many disorders, including digestive system disease, kidney or liver failure, pancreatitis, nervous system disorders, and ingestion of irritating substances and poisons [1]. The color alone does not tell you the cause. The pattern, timing, and other signs do.

Cause Table: Typical Clues and Urgency

Tick paralysis is caused by a tick and is associated with regurgitation, vomiting, and an increased risk of aspiration pneumonia [5]. Dogs with tick paralysis can also have lower gastrointestinal contraction frequencies, which means the gut moves more slowly [6]. This is a regional concern, so ask your veterinarian if ticks are a problem where you live.

Red Flags That Make It an Emergency

Call an emergency veterinary hospital right away if you see any of these:

• Brown or fecal-smelling vomit, especially repeated episodes
• Vomiting with a swollen, painful, or hard belly
• Retching without bringing anything up, which can suggest a blockage or bloat
• Weakness, collapse, pale gums, or trouble breathing
• Vomiting after eating a known foreign object, toy, skewer, or sand [2][3][4]
• Vomiting with blood, black material, or coffee-ground material
• Vomiting plus severe diarrhea, especially bloody diarrhea
• Known or suspected poison exposure [1]
• Vomiting in a dog that is already ill, very young, or very old

Short-term or occasional vomiting is generally not associated with other abnormalities. Long-term or repeated vomiting may be associated with weakness, lethargy, weight loss, dehydration, and electrolyte imbalance [1]. If your dog is vomiting brown material and also looks sick, that is an emergency.

Safe Things You Can Do at Home While Waiting

You cannot diagnose this at home, and you should not try. But you can do a few safe things while you wait for your veterinary appointment.

• Do not induce vomiting unless your veterinarian tells you to. Some objects and poisons can cause more damage coming up.
• Do not give human medications, including anti-nausea drugs, without veterinary guidance.
• Remove access to food, water, garbage, toys, and small objects until you know what is going on.
• Take a photo of the vomit. Note the color, smell, amount, and time.
• Save a sample in a sealed bag or container if your veterinarian asks for one.
• Check your dog's gums. Pale, white, or blue gums are an emergency.
• Check for a tick if you live in or have visited a tick area [5].
• Keep your dog warm, quiet, and away from other pets.
• Note whether your dog has passed stool, and what it looked like.

If your dog is vomiting yellow or green fluid along with the brown material, that can point to bile and stomach contents. You can read more about that pattern in Dog Threw Up Yellow Green Liquid and Dog Vomit Yellow Egg Like. If diarrhea is also present, see Dog Vomiting Yellow And Diarrhea.

What Your Veterinarian Will Check and Test

Your veterinarian will start with a full history and physical exam. They will ask about the color and smell of the vomit, when it started, how often it happens, and whether your dog is eating, drinking, and passing stool. They will feel your dog's abdomen for pain, swelling, or a palpable object.

Testing often includes:

• Blood work to check for dehydration, electrolyte imbalance, organ function, and inflammation [1]
• Abdominal radiographs (X-rays) to look for foreign material or obstruction [2]
• Abdominal ultrasound to look for obstruction, free fluid, or changes in the intestine [3]
• Fecal testing for parasites and digested blood
• A tick search if tick paralysis is possible [5]

In the kinetic sand case, radiographs showed a dilated small intestinal loop with radiopaque material, and surgery was needed after medical management failed [2]. In the foreign material case, ultrasound showed obstructive material and a small amount of abdominal free fluid [3]. These tests help your veterinarian decide whether your dog needs surgery, endoscopy, or medical treatment.

Treatment depends on the cause. Some dogs need fluids, anti-nausea medication, and a bland diet. Others need surgery to remove a foreign body [2][3]. Skewer foreign bodies can sometimes be removed by inducing emesis or by endoscopy, but surgery is often needed [4]. Your veterinarian will choose the safest option for your dog.

Doses of any medication are calculated by your veterinarian based on your dog's weight and health. Never give a dose on your own.

Prevention and Monitoring

Prevention depends on the cause.

• If coprophagia is the issue, pick up stool promptly, supervise outdoor time, and ask your veterinarian about underlying digestive problems.
• If foreign bodies are the issue, keep small objects, skewers, popsicle sticks, toys, and sand out of reach [2][4].
• If your dog has a known obstruction risk, feed small meals and monitor for vomiting, not eating, or belly pain.
• If ticks are a problem in your area, use tick prevention and check your dog after outdoor time [5].
• If your dog has long-term vomiting, keep a log of episodes, food, and stool. This helps your veterinarian spot patterns [1].

Monitor your dog closely after any vomiting episode. If the vomiting stops and your dog is bright, eating, and drinking, your veterinarian may advise a bland diet and rest. If vomiting returns, or if your dog gets worse, call your veterinarian again.

Limitations and When to Contact a Veterinarian

This article cannot tell you what is causing your dog's vomiting. Only a veterinarian who examines your dog can do that. Individual cases need a veterinarian.

Contact your veterinarian the same day if your dog vomits brown or fecal-smelling material once, has mild lethargy, or has a known poop-eating habit.

Go to an emergency hospital now if your dog has repeated brown vomit, a painful or swollen belly, retching without producing anything, weakness, collapse, pale gums, trouble breathing, known foreign object ingestion, or known poison exposure [1][2][3][4].

Schedule a routine visit if your dog has occasional vomiting, mild coprophagia, or long-term intermittent vomiting without severe signs. Your veterinarian can check for parasites, organ disease, and dietary issues [1].

Frequently Asked Questions

Should I induce vomiting if my dog threw up something that looks like poop?

No, do not induce vomiting unless your veterinarian tells you to. Some objects and poisons can cause more damage coming up, and some causes of brown vomit need surgery. Call your veterinarian first and follow their instructions.

Can coprophagia alone cause a dog to vomit brown material?

Yes, if your dog ate poop and then vomited soon after, the vomit can contain stool or smell like it. Coprophagia is common, but it can also be linked to digestive problems or parasites. A veterinary visit helps sort out the cause.

Is brown vomit always a sign of a blockage?

No, but a blockage is one of the main concerns. Brown vomit can also come from digested blood, severe gastroenteritis, pancreatitis, or other diseases [1]. Your veterinarian will use exams and imaging to find the cause.

How long can I wait if my dog vomits brown material once and seems fine?

If your dog vomits brown material even once, call your veterinarian the same day. If your dog is bright, eating, and drinking, your veterinarian may advise monitoring at home. If vomiting repeats or your dog gets worse, go to an emergency hospital.

What should I bring to the veterinary visit?

Bring a photo or sample of the vomit, a note of the time and frequency, and any object your dog may have eaten. Also bring a list of medications, supplements, and possible toxin exposures. This information helps your veterinarian choose the right tests and treatment.

Related Articles

• Dog Eating Poop and Vomiting: Is It Dangerous?
• Dog Vomit Yellow Egg Like
• Dog Threw Up Yellow Mucus
• Dog Threw Up Yellow Green Liquid
• Dog Vomiting Yellow And Diarrhea
• Dog Ate a Sock and Is Throwing Up: Emergency or Not?
• Dog Throwing Up Brown Liquid: What It Means
• Dog Throwing Up in Mouth and Swallowing: What It Means
• Dog Throwing Up Undigested Kibble: Why and What to Do
• Canine Parasitic Vomiting: Identifying Worms in Dog Vomit and Gastrointestinal Implications

References

1. Vomiting in Dogs - Dog Owners. Merck Veterinary Manual.
2. Small intestinal obstruction secondary to kinetic sand ingestion in a dog. The Canadian veterinary journal = La revue veterinaire canadienne, 2024.
3. Segmental jejunal volvulus and hemoperitoneum secondary to small intestinal foreign material in a dog. The Canadian veterinary journal = La revue veterinaire canadienne, 2025.
4. Management and prognosis of skewer foreign body ingestion in dogs: A comparative study of 114 cases following emesis, endoscopic retrieval or surgical removal. Australian veterinary journal, 2026.
5. Prevalence and significance of vomiting and regurgitation in dogs with tick paralysis caused by Ixodes holocylus. Australian veterinary journal, 2025.
6. Ultrasonographic evidence of gastrointestinal hypomotility in dogs with tick paralysis (Ixodes holocyclus): a prospective pilot study. Australian veterinary journal, 2026.

Further Reading

• American Veterinary Medical Association: First Aid Tips for Pet Owners
• Merck Veterinary Manual: Dog Owners
• Cornell Richard P. Riney Canine Health Center: Canine Health Information