Discovering blood in your dog's stool can be a heart-stopping moment for any pet owner. Your mind may race with questions and concerns, especially when your dog seems to be acting completely normal. How can something seemingly so serious coexist with a wagging tail and playful behavior?

If you spot blood in your dog's stool yet they're acting their normal self, it's important not to dismiss it. Even in the absence of distress, this can signal health issues ranging from minor to serious. Seeing your vet allows for early detection and treatment, ensuring your dog's swift return to health. This article will discuss when you should be concerned as well as offering insights into why this is happening and what steps you should take for diagnosis and treatment.

Essential Insights for Dog Owners

  • Blood in dog stool is a common symptom, with a variety of potential causes.
  • Many dogs have no other symptoms other than blood in the stool and act normally otherwise.
  • Bright red blood in the stool usually indicates bleeding in the lower digestive tract such as the colon. Dark, tarry stool suggests bleeding in the upper digestive tract such as the stomach.
  • Accompanying symptoms like vomiting, lethargy, weight loss, or loss of appetite are concerning and veterinary advice should be sought.

What does blood in dog stool indicate?

Before diving into the specific reasons why your dog might have blood in their stool, it's essential to have a basic understanding of a dog's digestive system. The digestive tract is a complex system responsible for breaking down food, absorbing nutrients, and eliminating waste. Any disruption in this process can manifest in various ways, including the presence of blood in the stool.

The 2 different types of blood in dog stool

Blood in your dog's stool can appear in two primary forms:

  1. Hematochezia: This is bright red blood, often coating the feces or appearing as drops alongside it. Hematochezia usually indicates issues in the lower digestive tract, such as the colon or rectum.
  2. Melena: This is a dark, tarry, and foul-smelling stool, indicative of digested blood. Melena is generally a sign of bleeding in the upper digestive tract, like the stomach or small intestine.

General causes of blood in stool

Blood in your dog's stool can be attributed to a variety of causes, ranging from mild to severe. Some common reasons include:

  • Parasitic Infections: Worms or protozoa can cause irritation and bleeding.
  • Dietary Indiscretions: Eating something they shouldn't have, like garbage or foreign objects, can lead to gastrointestinal irritation.
  • Gastrointestinal Ulcers: These can cause internal bleeding, often resulting in melena or hematochezia depending on where the ulcer is.
  • Colitis or Inflammation: Inflammation in the lower digestive tract can result in frank red blood or hematochezia. There may also be the presence of mucus within the stool with colitis.
  • Stress: During times of change such as visits to a boarding facility, traveling, or dietary changes, your dog's stool may have a bit of blood due to stress. The stools may be diarrheic or normal. This is called stress colitis.

Understanding the type of blood and potential causes can be your first step in determining the severity of the issue and whether a visit to your veterinarian is required.

Why your dog might be acting normally despite having blood in its stool

It's a perplexing situation: you've noticed blood in your dog's stool, yet they seem to be their usual playful, happy self. How can this be? Understanding why your dog might be acting normally despite this concerning symptom can offer some peace of mind as you navigate the next steps.

Stress-Related Causes

Dogs, like humans, can experience stress, which can manifest in physical symptoms like gastrointestinal issues. If your dog has recently undergone a significant change—such as a move, a new family member, or even a change in diet—this could cause temporary digestive upset that results in blood in the stool.

Minor Digestive Issues

Not all causes of blood in the stool are severe. Sometimes, minor digestive issues, such as eating something different or rich, can lead to temporary irritation of the digestive tract. In these cases, your dog might not show any signs of discomfort or illness.

The Resilience of Dogs

Dogs are incredibly resilient creatures. They have a high tolerance for discomfort and may not show obvious signs of distress even when something is amiss. This resilience is a double-edged sword: while it means your dog can maintain a happy demeanor, it also makes it challenging for pet owners to recognize when something is wrong.

Understanding why your dog might be acting normally despite the presence of blood in their stool can help you approach the situation with a balanced perspective. It's essential to monitor your pet closely and consult your veterinarian for a proper diagnosis and treatment plan.

When should you worry?

While it's somewhat comforting to know that not all instances of blood in your dog's stool are emergencies, it's important to recognize when the situation requires immediate veterinary attention. Here are some guidelines to help you determine the severity of the issue.

Symptoms That Require Immediate Veterinary Attention

If you notice any of the following symptoms accompanying the blood in your dog's stool, consult a veterinarian as soon as possible:

  • Lethargy
  • Vomiting
  • Loss of Appetite
  • Weight loss

Sometimes, the presence of additional symptoms can provide clues about the severity of the situation. For example, if your dog also has bloody diarrhea, is straining to defecate, or shows signs of abdominal pain, these could be indicators of a more serious problem that warrants a trip to your vet ASAP.

blood in dog stool

The frequency and amount of blood in the stool can also be telling. A single, small occurrence may not be an emergency but should still be monitored closely. However, frequent episodes or a large volume of blood are serious signs that you should not ignore.

How to establish a diagnosis

If you've observed blood in your dog's stool and decided to consult a veterinarian, you may be wondering what to expect during the diagnostic process. Understanding the tests and procedures that may be involved can help you feel more prepared and less anxious about what's to come.

Physical Examination

Your veterinarian will start by conducting a thorough physical examination of your dog. They may ask you questions about the type and frequency of blood in the stool, any other symptoms you've noticed, and your pet's medical history.

Stool Sample Analysis

One of the first tests your veterinarian may recommend is a fecal examination. This test checks for the presence of parasites, bacteria, and other pathogens that could be causing the blood in the stool. A sample will be collected and examined under a microscope to identify any irregularities.

Blood Tests

Blood tests, such as a complete blood count (CBC) and biochemistry profile, can provide valuable information about your dog's overall health. These tests can reveal signs of infection, anemia (e.g. low blood cells from bleeding), or other conditions that may be contributing to the symptom.

Ultrasound and X-rays

Imaging tests like abdominal ultrasound and X-rays can offer a more in-depth look at your dog's internal organs and structures. These tests can identify tumors, blockages, or other abnormalities in the digestive tract that may be causing the issue.

Based on the results of these tests, your veterinarian will make a diagnosis and recommend a treatment plan. It's essential to provide as much information as possible about your dog's symptoms, diet, and behavior to aid in the diagnostic process. The more comprehensive the tests, the more accurately your veterinarian can identify the cause and prescribe appropriate treatment.

What are the treatment options?

If you notice blood in your dog's stool that is acting normally, you can try some empirical treatments first. Feeding a bland diet such as boiled chicken or beef and rice for a few days, adding probiotics, and adding fiber can be beneficial. Psyllium husk or canned pumpkin are high sources of fiber.

However, if your dog's symptoms persist or worsen, it's important to consult with your veterinarian. The treatment plan will depend on the underlying cause of the blood in the stool and may include medications (e.g. antibiotics), dietary changes, or other medications directed at the underlying cause.


In summary, while blood in a dog's stool but acting normally otherwise is not always a cause for immediate concern. It's essential to monitor your pet closely and consult a veterinarian if the symptoms persist or worsen. With prompt attention and proper diagnosis, most cases of blood in the stool can be successfully treated, allowing your furry friend to return to their normal happy self.