Bloody Stools in Dogs : Causes, Symptoms and Cure

Bloody Stools in Dogs

Dog’s blood in stool problems can have various causes and is nothing to be taken lightly. The most common reasons for a bloody stool are parasites or an intestinal tract problem. Dog Stool Blood can also indicate minor problems such as constipation, a situation where stool is hard and has blood in it, to chronic conditions like bleeding tumor. Puppies, in particular, are vulnerable to parasites and gastrointestinal infections that can result in anemia, sepsis, and dehydration with a bloody stool being one of the symptoms. In puppies, red blood is almost always the result of parvovirus enteritis or intestinal parasites. For all dogs in general, treatment involves identifying the underlying cause and using a specific approach such as de-worming for parasites or dietary change to correct any food intolerance or allergy. A small red streak of blood along accompanied by a hard stool is probably due to constipation and is not of major concern. If you see a good amount of blood, visit your vet immediately for a rectal exam to check for anal and rectal tumors or an anal gland abscess. If there is a large amount of blood in the stool or if the blood is digested, a veterinarian needs to check for dehydration, coagulopathy, and anemia immediately.

Bloody Stools in Dogs : Causes, Symptoms and Cure

Dog blood in the stool can be caused by many things, such as:

  • Your dog might have eaten something really sharp that is cutting him internally
  • A scratch near the anus or from straining to defecate due to constipation
  • Parasites
  • Bacteria
  • Protozoa
  • Colon or Rectum bleeding/polyps
  • Bowel cancer
  • Canine anal sac infection
  • Irritable Bowel Disease
  • Food intolerance
  • Blood clotting problem
  • Allergy
  • Bowel malformation
  • Constipation
  • Bleeding Tumor
  • Parvovirus enteritis
  • Viral infections, such as parvovirus
  • Small intestine problems

Puppy Bloody Diarrhea:

Bloody Stools in Dogs : Causes, Symptoms and Cure

Dog health blood in stool problems in puppies is commonly caused by gastrointestinal infections and parasites (worms) and less commonly from parvovirus. These conditions can result in either a hard/loose stool, or diarrhea. Other symptoms can include sepsis (bacteria in puppy blood), dehydration and anemia. If the blood is red (hematochezia), and the amount is small, then it could be due to a simple case of constipation.  If a large amount of blood is seen, then the problem in most cases are parasites or parvovirus.

If the dog health blood in stool problem is caused by parasites, then it is probably due to roundworms, coccidia or hookworms. Hookworms and roundworms result in puppy bloody diarrhea or blood in a loose stool. Coccidia causes symptoms such as bloody diarrhea, mucus, and diarrhea. At the first signs of blood be sure to see a veterinarian so that treatment can be started early.  It is common practice to diagnose a dog health blood in stool problem by testing the feces for the presence of worm eggs. Since eggs may not be shed all of the time, repeated tests may be needed before worms are diagnosed.  If puppy worms are the problem, a dewormer will be prescribed by the veterinarian.  Parvovirus cannot be directly cured and is treated by addressing symptoms such as dehydration.


The appropriate treatment for dog health blood in stool depends on the cause of the problem. In the case of parasites, medication such as a dewormer is generally prescribed. Antibiotics are given for anal sac infection. Treatment for cancer depends on how advanced the disease is and how aggressively the owner wishes to treat it.

There is no treatment for parvovirus. Supportive care is given, and the dog may or may not survive. Again, we strongly encourage you to vaccinate your dog regularly.

To calm the gastrointestinal tract dietary change may be recommended to a high fiber or hypoallergenic diet. Intolerance might be treated with an elimination diet.

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