Blood in dog feces - Main causes

See Dogs files

Find blood in the dog's stool can be shocking and it is something that usually worries the owner a lot. Fortunately, in dogs, the causes of blood in the stool are not necessarily serious and can be a minor problem such as a change in diet. Still, they can also be due to a more serious condition, such as cancer or parvovirus..

In any case, it is highly advisable that you consult with your veterinarian to identify the real cause of the problem and rule out serious pathologies. If you have found blood in the dog's feces, this AnimalWised article will help you understand the possible causes of blood in your dog's stool.

You may also be interested in: White Feces in Dogs - Causes Index
  1. The color of blood in the dog's stool
  2. Causes of hematochezia in dogs
  3. Causes of mane in dogs
  4. Bloody diarrhea in dogs
  5. Treatment of blood in stool

The color of blood in the dog's stool

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

However, if you have come this far wondering why my dog ​​poops with blood, you should know that there are two medical types of blood in the stool: hematochezia and melena. This type of stool refers to the presence of blood in the dog's stool.

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

  • Hematochezia: presence of fresh blood in stool. This blood is bright red in the stool. In this case the blood has not been digested, it comes from the lower digestive system, generally the colon or rectum. This blood type would explain why a dog bleeds from the anus. In hematochezia, the blood may be mixed with the feces or you may observe a few drops of blood falling when your dog defecates..
  • Mane: is the presence of digested blood in the stool. The blood is then blackish in color, smelly and generally has the appearance of tar. This blood has been digested and comes from the upper portions of the digestive system. The mane is more difficult to appreciate than hematochezia, because due to the dark color of the stool it is not always easy to see that it is blood. If you are in doubt, you can place your dog's feces on white absorbent toilet paper, if a reddish color diffuses on the paper it is very likely that your dog has a mane.

Causes of hematochezia in dogs

Contrary to what happens in humans, hematochezia is not indicative of hemorrhoids in the dog. In any case, if your dog has hematochezia, it is better to consult a veterinarian as soon as possible because it could be a serious cause. Causes of fresh blood, that is colored bright red, they 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 stool. The most involved parasites are nematodes, such as hookworms and whipworms, but protozoa such as coccidia can also cause hematochezia. Your veterinarian will carry out tests and, from your dog's feces, will be able to determine what parasite it is and prescribe the most appropriate treatment for your dog..
  • Parvovirus: Canine parvovirus is an especially serious disease that mainly affects puppy dogs and all those dogs that have not been vaccinated and duly immunized. A dog affected by parvovirus may vomit, have diarrhea, lethargy, loss of appetite, and fresh blood in the stool. Parvovirus is a disease that can be fatal, so it is advisable to start treatment promptly, as soon as the first symptoms are noticed..
  • 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, so if you are going to change your dog's food, it is better to do it progressively over a week. If the change in diet is very sudden, it can cause vomiting and diarrhea. Even a simple new treat can cause colon inflammation in some very sensitive dogs and may explain the presence of fresh blood in the stool. Other food causes of fresh blood in the stool can be food intolerance and allergies..
  • Hemorrhagic gastroenteritis: Hemorrhagic gastroenteritis is a condition whose origin is difficult to determine. It causes vomiting, diarrhea, and a lot of blood in the dog's stool. If your dog has hemorrhagic gastroenteritis, he may need fluid therapy, medication and even food hospitalization.
  • Rectal woundsYour dog may have ingested a sharp object such as a stick or bone. This object, by following the intestinal tract, can erode the intestinal wall of the lower portion of the digestive system. It is generally possible to observe this object in your dog's stool, check for possible injuries to the rectum or swelling. Another cause of fresh blood in the stool can 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.
  • StressIn some cases, a stressful event can cause hematochezia in your dog. Some examples are: a move, a stay in a dog board 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 your dog's feces, also known as melena, it can be produced 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 a veterinarian. Some of the causes of mane in dogs are:

  • Use of NSAIDs: NSAIDs (or non-steroidal anti-inflammatory drugs) such as aspirin, can cause ulcers. A dog with bleeding ulcers in the digestive system will show black, tar-like blood because it is digested blood that comes from the stomach. Inform your veterinarian quickly for advice on 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. Rat poison can cause clotting problems and black blood in the stool. If you think that your dog has been able to ingest this type of poison, you should know that you are facing canine poisoning, a veterinary emergency, so you should go to the specialist immediately, without delay.
  • Complication after surgery: if your dog has recently been operated on and has black blood in his stool, you should call your veterinarian immediately, this complication can occur up to 72 hours after surgery.
  • TumorIf your dog has black blood in his stool, your vet will need to run tests to rule out the possibility of a bleeding tumor, such as polyps, or cancer in the dog. These causes can be common in geriatric dogs..
  • Use of Pepto BismolGiving your dog Pepto Bismol may cause a black color to your dog's stool but it is not blood. This black color will disappear when you stop medicating your dog.
  • Swallowing blood: your dog may have licked a bleeding wound or there may have been bleeding at the level of the nose or mouth and have ingested the blood that then causes the presence of digested blood from the stool.
  • Other causes: intestinal obstructions, fissures, trauma, a bacterial infection by Campylobacter or Clostridium for example can also cause blood in the stool.

Bloody diarrhea in dogs

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

Once again the causes are diverse, although the most serious diseases that can cause bloody diarrhea 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 the most severe cases, hospitalization of the dog and administration of serum may be necessary..

Treatment of blood in stool

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

From the diagnosis the specialist 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 condition. Most likely, in addition to the veterinary prescription, the specialist tells us that we should offer our dog gastrointestinal wet 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 merely informative, at we do not have the power to prescribe veterinary treatments or make any type of diagnosis. We invite you to take your pet to the vet in the event that it presents any type of condition or discomfort.

Leave Your Comment

Please enter your comment!
Please enter your name here