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What is Pooping Blood?

Should your dog be pooping blood (also known as hematochezia or having blood in his stool), it is likely that you will notice when you are scooping up his poop. There are various reasons as to why your dog would be pooping blood to include: 

  • Infectious agents
  • Dietary intolerance or allergy
  • Tumors
  • Colitis
  • Proctitis
  • Trauma
  • Bleeding disorder
  • Narrowing of anus or colon
  • Anal sacculitis 
  • Perianal fistulae

How serious it is that your dog is pooping blood will depend upon its cause. Blood in your dog’s stool will frequently point to an underlying condition that needs to be identified and addressed.

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Why Pooping Blood Occurs in Dogs

The reason for your dog pooping blood will depend upon its cause. For example:

Infectious Agents

Parvovirus, corona virus, bacterial infections (Clostridium and Salmonella), protozoal agents like coccidiosis and intestinal parasites like hookworms and whipworms are all infectious agents that can lead to blood in your dog’s stool.

Dietary Intolerance and Allergy

This can occur as the result of eating food that is no longer good, overeating, consuming a material that is not edible, a sudden change in diet or eating their human’s food can cause inflammation in your dog’s lower bowel and blood in their stool. An allergy can occur to a protein in a particular food causing colitis and blood in your dog’s stool. 


These can be present in the colon, rectum or anus and include benign and malignant tumors.


When blood in your dog’s stool is ongoing, it can point to his colon being inflamed, which is also called colitis. Colitis can be caused by a mass, infectious agent, food intolerance or allergy, as well as due to an immune-related or unknown cause.


This is when the rectum of your dog is inflamed. In many cases this is linked to colitis.


Trauma from a bite wound to your dog’s anal area, a pelvic fracture that interrupts the colon or rectum, a sharp item ingested and passed or an instrument or material being placed in your dog’s rectum can lead to blood in his stool.

Bleeding Disorders

Should your dog have a bleeding disorder, he may bleed from the lining of his lower bowel. Types of bleeding disorders include thrombocytopenia, which is when there is a decrease in the number of your dog’s platelets, inherited clotting disorders like hemophilia and abnormal platelet function problems, and disseminated intravascular coagulation (the result of a severe infection, organ failure or a major liver disorder).

Narrowing of Anus or Colon

This is secondary to other trauma, inflammation, cancer or foreign body. When stools are passed when the anus or colon are narrowed, bleeding can occur.

Anal Sacculitis

An inflammation or an abscess of the anal sacs can lead to the consistency of the fluid in the anal sacs to change into a bloody liquid. This liquid can provide a coating to the stools as your dog defecates.

Perianal Fistulae

Ulcerations that can be seen in the skin around your dog’s anus. If the ulcerations connect to the anus, blood can be present in the stool.

What to do if your Dog is Pooping Blood

If your dog is pooping blood, you will want to make an appointment for him to be examined by your veterinarian to determine what is causing this to occur. Upon examining your dog, your veterinarian will likely ask you for information regarding any other symptoms you have observed in your dog. Symptoms that may be connected to your dog pooping blood include:

  • His having to strain during a bowel movement
  • More bowel movements than usual
  • Excessive drinking and urinating
  • Vomiting
  • Diarrhea
  • Lack of appetite
  • Weight loss

After discussing any symptoms that you have noticed in your dog and depending upon what is seen during the examination, your veterinarian may conduct a rectal examination, a complete blood count and biochemistry profile, urinalysis, fecal examination, coagulation profile, abdominal x-rays and ultrasound and/or a colonoscopy. Through the examination, an understanding of the symptoms your dog is experiencing and the test results, your veterinarian will determine why your dog has blood in his stool.

Prevention of Pooping Blood

To prevent an infection by infectious agents, you will want to keep a close eye on your dog and keep him on his leash so as to ensure that he does not eat feces of an unknown animal. It is also important to keep your dog from eating food that has spoiled and minimize the human food that he eats. A veterinarian or technician can perform anal gland expression on a monthly basis which will help your dog avoid developing anal sacculitis.

Providing your dog a well-rounded, nutritious diet and ensuring he gets plenty of exercise will help his overall health. It is a good idea to take your dog for annual examinations so that your veterinarian can catch any issues before they become a serious health concern.

Cost of Pooping Blood

The cost of treatment for your dog having blood in his stool will depend on why it is occurring. For example, should your dog need his anal glands removed, the cost can be between $750 and $2,000, depending on the cost of living where you reside. If your dog is experiencing colitis, the average cost is $800.00. Treatment for a bacterial infection in your dog can average around $1500, depending upon your location.

Pooping Blood Questions and Advice from Veterinary Professionals

Labrador Retriever
7 weeks
Moderate condition
0 found helpful
Moderate condition

Noticed blood in puppies stool 8 days ago. Took her to the vet and was advised to start a probiotic. It happened for a few more days then stopped. Now, has started again. Any suggestions why this is happening?

Callum Turner
Dr. Callum Turner, DVM
1832 Recommendations
There are various causes for blood appearing in the faeces which may include infections (parvo the most well known), foreign objects, parasites, colitis among other issues; if the blood is appearing again I would suggest you visit your Veterinarian for a more in depth examination to determine an underlying cause as there may be an infection or parasite which is leading to blood appearing. Regards Dr Callum Turner DVM

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Golden Retreiver
1 Year
Serious condition
0 found helpful
Serious condition

Has Symptoms

Blood In Stool

Whitley has been in and out of the vet for the last week with gastroenteritis.

She lost 7 pounds while we were on vacation for a week and got into some chicken bones as well while we were gone.

When we got back she spent 4 days with the vet getting fluids and antibiotics after a bout of bloody diarrhea and passed the bones. Her stool returned to normal and we brought her home.

Since returning home she has been eating chicken and rice. She has now been home for 3 days and is pooping blood again.

She is going back to the vet today I just wanted to know what are other possible causes besides the gastroenteritis as treatment for that seems to have stopped working? Her vet says this is not normal.

Callum Turner
Dr. Callum Turner, DVM
1832 Recommendations
It may be a case of colitis which can be difficult to get under control even if all the bones have been excreted; also the chicken bones may have carried with them some bacteria which may have caused some enteritis adding to the problem. I would recommend having an x-ray done to make sure that all bones were passed and to make sure there is nothing else stuck in her gastrointestinal tract. Make sure that she is hydrated and return to your Veterinarian for an examination. Regards Dr Callum Turner DVM

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America Pitbull Terrier
6 Months
Fair condition
0 found helpful
Fair condition

My dog started pooping blood today in the afternoon when I arrived home... this is the first time he’s ever done this and I’ve been giving him water and he’s been eating so I’m not sure if he just ate something bad and it’s making his stomach upset or what could be causing this to happen to him..

Callum Turner
Dr. Callum Turner, DVM
1832 Recommendations
If Duke isn’t vaccinated, we should be concerned with parvo and you should visit your Veterinarian immediately especially if there is diarrhoea; if there is just blood in his stool, this may be caused by a variety of different conditions including infections, parasites, colitis, dietary issues, foreign objects, poisoning among other issues. Keep an eye on Duke to see if the bleeding passes, give an anthelmintic (wormer) and keep him hydrated; if you don’t see any improvement or the condition gets worse, you should visit your Veterinarian. Regards Dr Callum Turner DVM

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5 Years
Moderate condition
0 found helpful
Moderate condition

Has Symptoms

not drinking
Not eating

Medication Used

No medications were prescribed

Feya is usually active she is not eating drinking she is loosing weight pooping blood and she has thrown up a orange colored suptannce as well

Callum Turner
Dr. Callum Turner, DVM
1832 Recommendations

If Feya is defecating blood, you should visit your Veterinarian immediately as there are many different causes which may be due to infection, poisoning, foreign bodies, tumours etc… Until the underlying cause is determined I cannot advise you further. Regards Dr Callum Turner DVM

What good probiotic to give to my dog and where can I purchase it

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