Blood in the dog's feces - Main causes


The walk with our pets is one of the most pleasant moments of the day, but in addition to enjoying the moment we must be attentive to the depositions of our animal, since you can tell us a lot about your health.

It may seem unpleasant, but having a look at the stool will help us know if our dog is well or if it suffers from any digestive or intestinal problem. In these cases, one of the situations that causes the most impression is finding bloody stool.


It is a serious illness that especially affects puppies. In these cases in addition to feces with blood we can observe other symptoms such as vomiting, loss of appetite, diarrhea and lethargy.

This sickness can become deadly, so if the dog has these symptoms it is necessary to go immediately to the veterinarian.

Intestinal parasites

The internal deworming of our dogs is essential for their health and for ours. Numerous parasites such as nematodes or tricocephalus can cause stools to include blood.

In these cases the treatment is simple. The veterinarian will identify which parasite it is and will prescribe the appropriate medications.

Changes in food

It may seem to us that dogs can eat everything, but it really isn't. its digestive system is delicate and we should never make a radical change of food.

When changing the brand of feed you have to introduce the new one little by little so that your stomach is becoming her.

A change of diet may be behind the presence of blood in the stool, but it may also be due to some intolerance, a allergy and even the dog has eaten spoiled food.

Cancer or tumor

The presence of blood in the stool can also be a cancer or a polyp. Hence it is a of the first causes that the veterinarian tries to rule out.

All of these causes that we have seen may be the cause of feces with blood in dogs, but they are not the only ones. It can also be an intestinal obstruction or an abdominal swelling.

What to do if there is blood in the dog's feces?

If we notice that something is wrong with our pet we should check their gums to see if they are pale. Other symptoms that should alert us are the presence of vomiting, diarrhea or that the dog does not act normally.

In case we have noticed that the dog is not well and we also see blood in the stool, it is time to go to the vet as soon as possible.

It is advised to take one stool sample to do a parasite analysis. It is important that the stool collected from the specialist is not longer than 12 hours, since in this case a reliable analysis cannot be made.

Which is the treatment?

When the dog arrives at the veterinarian, several tests are usually done, including stool analysis, blood and urine tests, coagulation profile, abdominal ultrasound and even endoscopy.

The treatment to apply in each specific case it will depend on the reason that has given rise to the pathology.

Have you ever had this kind of problem with your pet? We would like to know your experience.

The color of the blood in the dog's feces

Checking the dog's feces is an essential routine that should be carried out by any caregiver on a daily basis. In fact, there are many types of feces in dogs and their meaning varies depending on color, consistency, frequency or frequency.

However, if you have come here wondering why my dog ​​poops with blood, you should know that there are two medical types of blood in the stool: hematochezia and mane. These types of bowel movements refer to the presence of blood in the dog's feces.

It is very important to be clear about the differences between both types, since this conditions the diagnosis:

    Hematochezia: presence of fresh blood in the stool. This blood has a bright red color in the stool. In this case the blood has not s>

Causes of hematochezia in dogs

Contrary to what happens with humans, hematochezia is not indicative of hemorrhoids in dogs. In any case, if your dog has hematochezia, it is better to consult with a veterinarian as soon as possible because it could be a serious cause. The causes of fresh blood, that is to say color bright red, can be very varied:

  • Parasites: The presence of intestinal parasites in dogs is one of the most frequent causes of the presence of fresh blood in the feces. The most involved parasites are nematodes, such as hookworms and trichocephals, but protozoa such as coccidia can also cause hematochezia. Your veterinarian will perform tests and, from the feces of your dog, can determine which parasite it is and prescribe the most appropriate treatment for your dog.
  • Parvovirus: Canine parvovirosis is a particularly serious disease that mainly affects puppy dogs and all those dogs that have not been vaccinated and properly immunized. A dog affected by parvovirus may vomit, have diarrhea, lethargy, loss of appetite and fresh blood in the stool. Parvovirosis is a disease that can be fatal, so it is advisable to start treatment quickly, just notice the first symptoms.
  • Feeding: Overfeeding can cause irritation in your dog's colon, diarrhea and fresh blood in his stool. In this case we can also observe mucus in the dog's feces. A modification in the diet can have similar effects, therefore, if you are going to change your dog's food, it is better to do it progressively for a week. If the change in diet is very sudden, it can cause vomiting and diarrhea. Even a simple new treat can cause inflammation of the colon in some very sensitive dogs and may explain the presence of fresh blood in the feces. Other food causes of fresh blood in the stool can be intolerance and food allergies.
  • Hemorrhagic gastroenteritis: hemorrhagic gastroenteritis is a condition whose origin is difficult to determine. It causes vomiting, diarrhea and the presence of a lot of blood in the dog's feces. If your dog has a hemorrhagic gastroenteritis you may need fluid therapy, medication and even food hospitalization.
  • Rectal wounds: Your dog may have ingested a sharp object such as a stick or a bone. This object, by following the intestinal tract, can erode the intestinal wall of the lower portion of the digestive system. It is usually possible to observe this object in the feces of your dog, control the presence of possible wounds in the rectum or swelling. Another cause of fresh blood in the stool may be rectal polyps, which are an abnormal growth that can usually be diagnosed by a veterinarian by rectal palpation or by endoscopy. Sometimes these can be carcinogenic, so you must ensure control by a veterinarian.
  • Stress: In some cases, a stressful event can cause your dog hematochezia. Some examples are: a move, a stay in a dog pension or the arrival of a new dog in the house. Find out what to do if your dog is stressed.

Causes of mane in dogs

The dark blood In the feces of your dog, also known as mane, it can occur in the lungs, pharynx, esophagus, stomach or upper small intestine. Once again the causes are varied, some of them serious, so it will be essential to consult with a veterinarian. Some of the causes of mane in dogs are:

  • Use of NSAIDs: NSAIDs (or nonsteroidal anti-inflammatory drugs) such as aspirin can cause ulcers. A dog with bleeding ulcers in the digestive system will show tar-like black blood because it is digested blood that comes from the stomach. Inform your veterinarian quickly to advise you about the use of NSAIDs in your dog.
  • Blood clotting disorder: various canine diseases can cause bleeding disorders with consequent bleeding and blackish blood in the stool. Poison against rats can cause clotting problems and black blood in stool. If you think that your dog has been able to ingest this type of poison, you should know that you are facing a canine poisoning, a veterinary emergency, so you should go immediately to the specialist, without delay.
  • Complication after surgery: If your dog has been operated recently and has black blood in the stool, you should call your veterinarian immediately, this complication can occur up to 72 hours after surgery.
  • Tumor: If your dog has black blood in the feces, your veterinarian will have to perform tests to rule out the possibility of a bleeding tumor, such as polyps, or a cancer in the dog. These causes may be common in geriatric dogs.
  • Use of Pepto Bismol: giving Pepto Bismol to your dog can cause a black color to your dog's feces but it is not blood. This black color will disappear when you stop medicating your dog.
  • Blood ingestion: Your dog may have licked a bleeding wound or it may have bled at the level of the nose or mouth and ingested the blood that then causes the presence of digested blood from the feces.
  • Other causes: intestinal obstructions, fissures, trauma, a bacterial infection by Campylobacter or Clostridium can also cause blood in the stool for example.

Diarrhea with blood in dogs

If you have observed that your dog presents heavy bloody diarrhea you should go to the veterinarian urgently, since liquid feces usually cause in turn dehydration, which will quickly worsen the health status of your dog.

Again, the causes are diverse, although the most serious diseases that can cause diarrhea with blood in dogs are parvovirus, which we have already mentioned in the causes of hematochezia, or canine distemper, also known as distemper, another disease life threatening. In more severe cases, hospitalization of the dog and administration of serum may be necessary.

Stool blood treatment

The treatment of blood in the dog's feces will be closely related to the causes that cause it. Thus, if we have observed the presence of mane or hematochezia, we will go directly to the specialist, preferably with a Stool sampleIn this way, our trusted veterinarian can analyze it under a microscope and determine what is causing its appearance.

From the diagnosis the specialist we will prescribe a treatment. Remember that self-medicating a dog can be detrimental to its health and that even in some cases we can significantly aggravate the picture. Most likely, in addition to the veterinary prescription, the specialist tells us that we should offer our dog wet gastrointestinal food or a soft diet based on rice and chicken, in this case without the carrots that we add in the article.

This article is purely informative, at we have no power to prescribe veterinary treatments or make any kind of diagnosis. We invite you to take your pet to the veterinarian in case he presents any type of condition or discomfort.

If you want to read more articles similar to Blood in the dog's feces - Main causesWe recommend that you enter our section on Intestinal Problems.

My dog ​​has bloody diarrhea.

There are two main causes for which a dog can show blood next to its feces in the form of diarrhea, one of them it's really worrying.

The lack of intestinal flora and irritation of the intestines can cause the presence of some drops of blood along with diarrhea, sometimes we will also appreciate intestinal mucus.

To solve this problem obviously we must look for the cause of diarrhea and also restore the intestinal flora of our dog. We must go to a veterinarian to determine the origin and prescribe the appropriate medication.

Some really serious diseases like canine parvovirus can cause symptoms, heavy and bloody diarrhea. Needless to say, we must go to the veterinarian urgently if the symptoms of parvovirus coincide with those of our puppy.

Stool with blood from intestinal parasites

There are a wide variety of intestinal parasites that can cause our dog to poop solid with a few drops of blood or even have soft poop episodes or diarrhea

There are monthly and quarterly treatments to keep our dog prevented from parasites, using a pill (which our veterinarian will give us).

However, not all parasites die, some how the giardias are extremely resistant and require a stronger and continued treatment.

So even if you think your dog does not have parasites, it is possible that it does and that is the reason it defecates blood.

Badly digested food, sticks, toys

We all know what dogs are like, if they catch a stick they gnaw it until they are undone ... swallowing many splinters. The same goes for toys… they can break them and swallow some sharp piece.

Even the bones can cause some small intestinal tear if they are digested well, hence the importance of never giving cooked bones to our dogs.

Usually when defecating remains of sticks or food Badly digested is when bleeding occurs, due to some scratch in the intestines or in the anus itself (sphincter).

Although to be completely sure that it has been an isolated episode that does not require major importance, we must pass a mandatory review at the veterinarian. In this way you can see if there is any rest left, is blocked, or similar ...

Constipation and the presence of blood in the poops

It may seem like a joke but the truth is that there are many dogs that suffer from severe constipation, due to A bad diet based on very astringent ingredients.

Manufacturers of dog food (feed / balanced / croquettes) become obsessed with dog feces being hard, so they add many astringent ingredients.

We as owners of dogs, also unintentionally, become obsessed that their feces should be always hard... when in reality, it would be normal for your stools to be somewhat soft.

Constipation can often cause small bleeding, caused by the effort the dog must make to defecate. However, it is impossible to determine the real reason without a veterinary review.

Blood hidden in stool

We will not always be aware that our dog is defecating with blood, since many times the blood is hidden in the feces and is not visible.

Only through a fecal study (in veterinary clinic) it will be possible to see if there is hidden blood in the poops of our dog. This can be caused by disease, digestive problems, objects that have been eaten, etc ...

Even medication intake can cause bleeding, which is reflected in the feces of our dog.

Light blood or dark blood?

The color of the blood can give us some clues about its origin. If we see dark blood in the dog's feces, it means that it has gone through the digestive system and in part it has been absorbed.

If the blood is clear, it indicates that bleeding has occurred after passing through the digestive system, so it can be a internal wound, fissure, chafing ...

Regardless of color, a veterinarian should always assess it because the causes can be so many that it is impossible to determine it without a complete veterinary analysis.

Should I consult with a veterinarian?

Of course, whenever you see blood in your dog's feces it is advisable to collect a sample and go to the vet with the stool sample and with our dog.

The veterinarian will perform a medical exam to our dog and will analyze the samples to determine the origin of the bleeding and assess whether it is something serious or something specific.

There are no magic home remedies nor grandmother's tricks that are worth, only a veterinarian can help us in these cases. If your financial resources do not allow you to go to a veterinarian, go to an animal shelter.

Why does my dog ​​poop with mucus?

We must make it clear that it is completely normal for a dog's poop to have a certain mucus, since the intestine itself lubricates the colon to favor intestinal transit.

And to this, we must add the substances that secrete the anal glands of our dog when defecating. So I miss it, is that our dog's poop looks dry instead of something lubricated.

However, an excess of lubricant in the stool can give the sensation of mucus, somewhat jelly and whitish or greenish appearance. It's like a layer of mucus that covers your stool, being explicit.

Clarified this, the main reasons why a dog poops with mucus are:

  • Overgrowth of intestinal bacteria
  • Colitis / Poisoning / Changes in diet / Intolerances
  • Parasites and / or polyps
  • Strange objects

The imbalance of intestinal bacteria cause mucus

We all have bacteria in our intestines that are responsible for digesting food or transforming it into digestible matter. exist beneficial bacteria for the digestive system and harmful bacteria.

And despite what we may think, there must be a natural balance between them. When an imbalance occursEither by the excessive growth of harmful bacteria or by that of beneficial bacteria, excess mucus is produced.

There are many factors that can affect the erroneously called intestinal flora, since it is actually called intestinal microbiota. From a disease to a fermented food, not forgetting factors such as stress itself.

Mucus in the stool from food

If a food feels bad for our dog, it will generate a reaction in his intestine that can lead to the attachment of mucus in the stool. Due precisely to a decompensation of the intestinal microbiota.

A food intolerance or allergy, like any product that could have poisoned our dog, can cause fecal mucus and diarrhea. In addition to possible skin rashes.

The feeding is a key factor, so it may simply be something that our dog has eaten and sat badly, or something much more serious like an undiagnosed intolerance.

Intestinal parasites cause stool mucus

We don't get tired of recommending our worms internally as many times as our veterinarian recommends. Some dogs live in high risk places and they need to be dewormed more often than others.

Yes, intestinal parasites also known as intestinal worms can cause mucus in the poops, among many other things. If we appreciate yellow and mucus poop, or dark poop but also with mucus and small white dots, how small grains of rice in feces ... are parasites.

But be careful, not all parasites are visible in the stool. It may be that our dog has parasites and we cannot detect them, except with a veterinary review. Polyps can also cause mucus and Blood in the stool.

Foreign objects that irritate the digestive system

We already know how dogs are, the same eat their feed that a little stick, a piece of plastic or even a ball. If we get confused ... either by hunger or by playing, they are capable of swallow anything.

Some foreign bodies may be sharp or sharp and cause intestinal irritation, which in turn will produce mucus in the stool, sometimes accompanied by blood and / or diarrhea.

What do I do if my dog ​​poops with mucus?

If you appreciate mucus in your dog's feces it is important that you take it to a veterinarian, since the mucus in the feces is sometimes caused by simple things but many others, by serious health problems.

Without knowing the origin of excess mucus, it is impossible to establish an adequate treatment. That is why we must go to a veterinary clinic and let a canine health specialist advise us.

If our dog in addition to mucus shows blood in the feces, diarrhea, fever or any other symptoms that attract our attention, then we should prioritize the visit To veterinary.

What disease does my dog ​​have if in his stool I detect dark and smelly blood?

Fresh blood is not as worrisome as this. If in your bowel movements you notice black mucus and it smells, we are talking about a type of blood called mane, and is usually a symptom of a serious illness. This type of blood in stool may indicate that your dog has a tumor, poisoning from a medication that is harming him or that a recent surgery has not worked out well.

If you live in a country house, be careful of the pesticides or poisons you use to get rid of the vermin, you will know that your dog has eaten them by the mane. In the same way that in young puppies the presence of parvovirus can occur, warning this with red blood, in dogs that are already very old, black blood can indicate a tumor. To reassure you, we have to tell you that if you have a wound on one leg it is normal for you to lick, swallow that same blood and be what you are seeing when examining your stool.

If you have had surgery for three days or less and have this color in your blood, it is possible that something went wrong during the surgery, contact the person responsible for your intervention again to have it examined.

As you see, blood in stool is never good news. If it is red it is more possible that it is something easily treatable, being worse if we talk about black blood, but even in these cases it may not be anything serious. To get out of doubt, contact us. From Barkibu we want to remind you with this article how important it is regularly check your dog's stool.