what causes blood in stool in dogs

what causes blood in stool in dogs


What Causes Blood in Stool in Dogs?

You love your four-legged friend and it’s terrifying when you notice something off, especially something as alarming as blood in their stool. Let’s dive into some possible causes and what you can do to help your furry friend.

1. Hemorrhagic Gastroenteritis (HGE)

Hemorrhagic Gastroenteritis is a sudden, severe condition that can cause blood in a dog’s stool. The exact cause of HGE is unknown, but it can be life-threatening, especially in small breeds.

  • Symptoms: Vomiting, loss of appetite, lethargy, and diarrhea (often bloody)
  • Treatment: Hospitalization and aggressive treatment are often necessary

2. Parasites and Worms

Parasites and worms are common culprits of blood in dog stool. These unwanted guests include hookworms, whipworms, and giardia.

  • Symptoms: Diarrhea, weight loss, and blood or mucus in stool
  • Treatment: De-worming medication and good hygiene practice
Parasite Symptoms Treatment
Hookworm Anemia, weight loss, diarrhea Antiparasitic drugs
Whipworm Diarrhea, weight loss Antiparasitic drugs
Giardia Diarrhea, vomiting, weight loss Antiparasitic drugs

3. Dietary Issues and Allergies

Just like humans, dogs can also have dietary issues and allergies that may cause blood in their stool. This could be due to a sudden change in diet, food allergies, or ingestion of something inappropriate.

  • Symptoms: Diarrhea, vomiting, itching, and bloody stool
  • Treatment: Diet modification, allergy testing, and avoiding known allergens

4. Trauma to the Lower Digestive Tract

Accidents, injuries, or foreign objects can cause trauma to your dog’s lower digestive tract, leading to bloody stool.

  • Symptoms: Visible distress, bloody stool, vomiting, and loss of appetite
  • Treatment: Depending on severity, surgery may be required

5. Underlying Health Conditions

Certain underlying health conditions like cancer, clotting disorders, or inflammatory bowel disease can cause bloody stool in dogs.

  • Symptoms: Vary according to the condition
  • Treatment: Varies according to the condition and could involve medication, dietary changes, or surgery


1. Should I take my dog to the vet if I see blood in their stool?
Yes, it’s always a good idea to consult with your vet if you notice any changes in your dog’s stool, especially blood.

2. Can blood in dog stool be caused by stress?
Yes, stress can lead to gastrointestinal upset, which may result in bloody stool.

3. How is blood in dog stool diagnosed?
A vet will typically conduct a physical examination, ask about your dog’s diet and lifestyle, and may request stool samples for testing.

4. Can a change in diet cause bloody stool?
Yes, sudden dietary changes can cause gastrointestinal upset, which may result in bloody stool.

Remember, as a caregiver, it’s essential to be observant and proactive about your dog’s health. If you’re ever in doubt, always consult a vet.