Hematochezia in Dogs
Written By hannah hollinger
Published: 05/23/2017Updated: 12/22/2021
Veterinary reviewed by Dr. Linda Simon, MVB MRCVS
Hematochezia in Dogs - Symptoms, Causes, Diagnosis, Treatment, Recovery, Management, Cost
What is Hematochezia?
Dogs get into and eat all sorts of things.  It can upset their gastrointestinal tract and lead to diarrhea or blood in the stool.  While the cause may be something simple such as slight irritation from eating some rich food, it can also be caused by something more severe like toxicity or tumors. Your veterinarian will want to examine your dog and perform diagnostic lab work in order to come to a proper diagnosis.  Once diagnosed, treatment can begin; it will vary depending on what the cause of your dog’s symptoms is.  Prognosis of recovery varies along with the cause.  If the hematochezia is caused by upset stomach or intestinal parasites, prognosis of recovery is good with treatment.  If the cause is a tumor, his prognosis is more guarded.
If there is blood in your dog’s stool it is known as hematochezia; this is not a normal finding in dog’s bowel movements.  If you see blood in your dog’s stool, it is recommended you have him evaluated by his veterinarian.
Youtube Play
Symptoms of Hematochezia in Dogs
By definition, hematochezia is bright red blood from the anus, with or without fecal material present.  Symptoms in addition to the blood may include:
  • Presence of rectal polyps
  • Loose stool with blood mixed in or on the surface
  • Formed stool with blood on the surface 
  • Discolored stool
  • Mucus (slime) in the stool
  • Straining when passing stool
  • Blood can be in streaks or droplets 
  • Intermittent finding or consistent
Types
There are two different types of blood that can be found in the stool, hematochezia and melena.  Melena is seen as dark, tarry, black feces. This indicates bleeding high up in the intestines and the dark stool is the passing of old digested blood.  Hematochezia is bright red, fresh blood in the feces.  This indicates bleeding in the lower intestines such as the colon or rectum.
Causes of Hematochezia in Dogs
There are a variety of ailments that can cause hematochezia, most related to the gastrointestinal tract.  Inflammatory bowel disease is one of these illnesses that can have this as a symptom. Other illnesses with this as a symptom includes colonic neoplasia, hemorrhagic gastroenteritis, colonic or rectal tumors, or erosions or ulcerations within the GI tract are just some diagnosis that can have hematochezia as a symptom to indicate larger problems.
Diagnosis of Hematochezia in Dogs
When you arrive at your veterinarian’s office, she will start with performing a physical exam and collecting a verbal history from you.  While the issue may be with your dog’s bowel movements, she will want to evaluate him entirely in order to check for a possible cause.  She will want to know when it started, it if has been progressing, if it is constant or intermittent, and similar questions.  
When it comes to trying to diagnose a cause, lab work and imaging will be performed for more information in regards to your dog’s condition. Blood work will consist of a complete blood count (CBC) and chemistry panel for basic information on how your dog’s internal organs are functioning.  It can also indicate if he is losing a lot of blood somewhere in his body.  Your veterinarian may also want to perform fecal diagnostic testing in order to rule out intestinal parasites that can cause blood to be present in the stool.  
Radiographs and abdominal ultrasound of the gastrointestinal tract are a good way to check for an abnormality that may be causing the blood in the stool.  The use of an endoscope for a view within the gastrointestinal tract can be extremely helpful in the diagnostic process.  It will allow your veterinarian to get a live view of the inside of your dog’s GI tract to check for polyps, perforation, or any other sort of abnormality that can be causing the blood.
The diagnostic lab work, imaging, and history of your dog’s condition should help the veterinarian come to her diagnosis.  If she is still unsure, there are additional, more specific tests she may suggest depending on your dog’s specific case.
Treatment of Hematochezia in Dogs
Treatment will be symptomatically in response to your dog’s symptoms.  If lab work and imaging are also performed, the results will indicate if additional therapies or surgery is needed.  Each dog’s condition is unique to him so there is no exact treatment.
Your veterinarian may begin small by simply changing your dog’s diet and prescribing a probiotic.  She will prescribe him a food that is very easy on the digestive tract and should lessen his discomfort.  The probiotic will ensure there are good bacteria in your dog’s GI tract and restore the natural balance.  If parasites are suspected, a dewormer will be administered.  There are other medications and supplements that can be prescribed to calm your dog’s digestive tract, decrease any inflammation, and offer him some relief.
If the cause involves the growth of polyps or tumors, your veterinarian may suggest surgical intervention depending on the severity.  This however, comes with its own risks so be sure to discuss this option thoroughly with your veterinarian.  
Finding and treating the cause is ideal in this situation.  If you do not pursue and treat the original cause of your dog’s hematochezia, you are only masking his symptoms.
Petted logo

Worried about the cost of treating your pet's symptoms?

Pet Insurance covers the cost of many common pet health conditions. Prepare for the unexpected by getting a quote from top pet insurance providers.

Get a quote

background
Recovery of Hematochezia in Dogs
Depending on the cause of the hematochezia, your dog’s prognosis will vary.  If it is symptoms from a small case of gastroenteritis or parasites, treated properly his prognosis is good.  If it is caused by something more severe such as a tumor, his prognosis is guarded.  The sooner you begin treatment for your dog’s condition, the better his chances of recovery.
Hematochezia can be symptomatic of a serious medical condition. To avoid high vet care expenses, secure pet health insurance today. The sooner you insure your pet, the more protection you’ll have from unexpected vet costs.
Hematochezia Questions and Advice from Veterinary Professionals
dog-breed-icon
Rhodesian Ridgeback
dog-name-icon
Kuni
dog-age-icon
9 Years
thumbs-up-icon

0 found this helpful

thumbs-up-icon

0 found this helpful

My pet has the following symptoms:
Blood In Stool
My dog has bright red blood in her stool. I noticed it for 2 days before diarrhea started (no signs of blood once diarrhea started). I put her on a rice and beef diet (she is allergic to chicken). She is on a limited ingredient, high protein diet- so I wanted to be conservative. Her stool formed up in 3 days and was clear for 2 days. This evening the bright red blood was back. She has a great appetite. No signs of physical change - same energy and she doesn’t seem uncomfortable. She has had her anal glands expressed before (but it’s been 6-7 months). I’m wondering if it has something to do with her glands (I see no external lumps or bumps anywhere on her body).
June 26, 2018

Answered by Dr. Michele K. DVM
0 Recommendations
Kuni could have a problem with her anal glands, or a problem with her colon. Bright red blood is typically from somewhere near the end of the colon, and it might be a good idea to have her examined by your veterinarian, as they can do a rectal exam and determine if there are any masses, growth, or ulcerations.
June 26, 2018
It's also not consistent. In the morning there isn't any blood but in the evening there is blood (so far, just one evening). Would that change anything or reinforce your suggestions?
June 26, 2018
Kuni's Owner
Was this question and answer helpful?
dog-breed-icon
Japanese Chin/Wiener Dod
dog-name-icon
Duke
dog-age-icon
4 Years
thumbs-up-icon

0 found this helpful

thumbs-up-icon

0 found this helpful

My pet has the following symptoms:
Not Drinking Not Eating
I took my dog to urgent care saturday night and they were unclear as to what his issue was exactly except they said he was anemic, dehydrated and had some sort of intestinal infection. They sent me home with 4 different meds. He seems a little better but not much. He won't eat or drink so I have been giving him Pedialyte every 2-4 hours and I am only able to get him to take between 2-4 oz through a syringe. I have also been giving him baby food when he takes his meds so it doesn't upset his stomach. He finally went poop and its still a reddish brown which is what I am worried about. I have also checked his gums and they are still not pink like they should be. How long does it normally take for the meds to kick in and make him feel better?
May 28, 2018
0 Recommendations
I don’t know how long it would take for the treatment to start working if we don’t have a diagnosis or a list of the prescribed medication; you should visit your regular Veterinarian for a follow up examination to determine if they are able to make a diagnosis and to see if Duke is on a good course of treatment. The presence of fresh blood in the stool may be due to lower gastrointestinal inflammation, infections, parasites, tumours, anal gland disorders, poisoning among other causes; without examining Duke I couldn’t start to determine a cause or if the treatment is correct. Regards Dr Callum Turner DVM
May 29, 2018
Was this question and answer helpful?
dog-breed-icon
Border Collie
dog-name-icon
Lacey
dog-age-icon
8 Months
thumbs-up-icon

0 found this helpful

thumbs-up-icon

0 found this helpful

My pet has the following symptoms:
Blood In Stool
My dog is a female pure bread border collie and is about 8 months old. She has bright red blood in her stool, which is very loose and mucusy as well. She also has frequent urination, four times in 5 minuets all of which were large amounts of urine. I’m worried something might be wrong with her and wonder if I should rush her to the vet.
May 21, 2018
0 Recommendations
You should have your Veterinarian examine Lacey as there are a few possible causes for these symptoms and the sooner she is seen the better; without examining her and possibly running a test or two I cannot say what the specific cause is. You should visit your Veterinarian who may also do a blood test and urinalysis to help narrow in on a diagnosis. Regards Dr Callum Turner DVM
May 22, 2018
Was this question and answer helpful?
dog-breed-icon
German Shepard lab mix
dog-name-icon
Hazel
dog-age-icon
1 Year
thumbs-up-icon

0 found this helpful

thumbs-up-icon

0 found this helpful

My pet has the following symptoms:
Small Amount Of Blood On Stool
Dog was groomed and had anal glands expressed two days ago. Has had loose stools here and there since due to anxiety issues with going to the groomer. Today she had a normal stool with a tiny amount of bright red blood on the very beginning of the stool. I wiped her bottom after and she tried to sit down like it was bothering her. Eating drinking normal and acting normal. Every once in a while she looks back at her tail then goes about her normal day. Could the blood and irritated rectum just be sore from having her glands expressed and having upset stomach from anxiety? She’s up to date on all shots and flea/tick/heart worm medicine. The groomer said her glands were full but the fluid looked good so signs of infection.
May 20, 2018
Answered by Dr. Michele K. DVM
0 Recommendations
It is possible that the little bit of bleeding is due to her anal gland expression, although that isn't totally normal. Since she seems to be doing well otherwise and acting normal, you should be okay keeping a close eye on her for the next day or two. If the bleeding continues, or she can't get comfortable, it would be best to have her seen by a veterinarian to have the area assessed and make sure that everything is okay.
May 20, 2018
Was this question and answer helpful?
Need pet insurance?
Need pet insurance?

Learn more in the Wag! app

Five starsFive starsFive starsFive starsFive stars

43k+ reviews

Install


© 2025 Wag Labs, Inc. All rights reserved.


© 2025 Wag Labs, Inc. All rights reserved.