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Bloody Diarrhea in Dogs - Common Causes & How to Stop it

Bloody Diarrhea in Dogs - Common Causes & How to Stop it

At our Plains veterinary hospital, our team of specialists and vets know that it can be surprising, or even scary, when your dog develops diarrhea, especially when it contains blood. Here, we explain some of the causes of diarrhea in dogs, when you should seek professional help and what treatments and tests may be provided.

While it may be annoying, or even worrying, when our canine companions have loose stool or diarrhea, it isn't that uncommon. There are a number of reasons why this common condition might arise in your pup. Diarrhea is the result of faster-than-normal movement of digested food and other fecal material through your pup's gastrointestinal tract and can be a symptom of any number of common or serious conditions and diseases. 

What is causing my dog's diarrhea?

Dogs can develop diarrhea for any number of reasons including stress associated with travel, significant changes in their routine or staying at a pet boarding facility. In instances like these, your dog's diarrhea should clear up after a day or two. However, this condition can also be a sign of infection or illness affecting your dog's gastrointestinal tract. This can include food allergies, gastrointestinal disorders, intestinal parasites, internal injuries and more. 

When should I be worried?

When you notice your dog has developed diarrhea, keep an eye on their behavior and the consistency of their stool over the course of the next day or two. If their bowel movements don't return to normal or if they seem lethargic, skittish or otherwise "off," then it's time to bring them in to your Plains vet's office. One of the most worrying signs that something is wrong with your dog is if you notice blood in their stool while they are experiencing diarrhea. 

There's blood in my dog's diarrhea, what should I do?

Regardless of the cause, bloody diarrhea or vomiting is an emergency that could potentially be fatal if left untreated, so immediate veterinary care is called for.

At Northeast Veterinary Referral Hospital, our specialists and emergency vets are here to offer advanced care for pets with internal health conditions.

How can I tell if it's actually blood?

Before calling your emergency vet, you may find yourself wondering if it is actually blood you are seeing in your dog's stool. Blood in the stool of our canine companions loooks different depending on its place of origin.

If your pup's stool is streaked with distinctive fresh blood, this could be a sign that it’s from either the upper part of their small intestine or from your dog's stomach. If the blood is partially digested it will look a bit like coffee grounds and may have originated from lower in your dog's intestines.

If the blood is fresh it may be from your pet's colon, but if it’s dark, tarry or sticky, it's likely from your pup's stomach or upper intestinal tract.

What are some of the causes of blood in my dog’s diarrhea?

If you’ve spotted blood in your dog’s stool, it's obviously a cause for concern, but what could be at the root of this worrying symptom?

Some of the most common causes for bloody diarrhea in dogs include:

  • Parasites
  • Stomach ulcers
  • Severe vomiting
  • Viral or bacterial infection
  • Trauma to the gastrointestinal (GI) tract from eating bones or other materials.
  • Hemorrhagic gastroenteritis (HGE) (severe bloody diarrhea and bloody vomiting, caused by infectious agents)
  • Foreign body ingestion (toys, rocks, fabric etc)
  • Sudden dietary changes that cause irritation or impact the immune system
  • Stomach or esophagus tumors
  • Poisoning from toxins such as plants

Other symptoms that may become apparent if your dog is experiencing continuous diarrhea include weight loss, fluid loss, dehydration, lethargy, electrolyte imbalances, hypovolemic shock and hemoconcentration.

What will the vet do if I bring my dog in?

The underlying cause of your dog's bloody vomit or diarrhea can be challenging to diagnose. If routine diagnostic procedures are unsuccessful in pinpointing the cause more invasive diagnostic testing may be needed to diagnose the issue.

When you take your dog to your veterinarian or the emergency vet due to bloody diarrhea or vomiting this is what you can expect:

  • Our vets will make note of your dog's medical history such as predisposition for gastrointestinal disorders, previous ulcers and how severe their diarrhea has been thus far.
  • A comprehensive physical exam including observation of samples of your pup's stool, feeling their abdomen, testing their skin and examining their mucus membrane.
  • Running an array of tests like bloodwork, urinalysis, endoscopies, radiographs and fecal exams.

What is the treatment for severe or bloody diarrhea in dogs?

The course of treatment prescribed for your pooch will depend on the underlying cause of your pup's worrisome stool, but may include:

  • Electrolyte and fluid therapies for hemorrhagic gastroenteritis
  • Medications to soothe intestines
  • Surgical remedies for tumors, ulcers or physical obstructions
  • Antibiotic therapy for certain types of infections
  • Anthelmintics for parasitic infections
  • Corticosteroid therapy for cases of hypovolemic shock

Will my dog be ok?

In most cases with proper treatment, dogs respond very well and recover quickly.  The main priority after your dog’s underlying issue is treated should be healing time, as the inflamed intestines will need time to recover. In some cases, a modified diet can help reduce gastrointestinal disorders and intestinal infections.

Your vet may recommend withholding food and/or water for 24 hours to give your dog's intestine a chance to rest. A bland diet for 3 to 7 days following the 24-hour rest period, then a gradual return to your dog’s normal diet, should help.

It's important to stay vigilant as your dog recovers since certain proteins or other elements may result in the problem recurring. In these cases, your dog may need a specialized hypoallergenic medical diet.

Is there a way to prevent severe or bloody diarrhea from recurring?

After infections, some vets recommend restoring intestinal microflora by introducing food additives (such as synbiotics, probiotics and probiotics) to improve gut function and prevent infection from coming back.

If you feed your dog a homemade diet the formula should focus on ideal nutrient profiles along with energy density, depending on the issue being addressed. These diets can be less fatty and have more highly digestible nutrients. Always consult your veterinarian on any dietary changes, particularly if your dog has had problems with bloody diarrhea and vomit.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.

Have you noticed your dog developing persistent diarrhea? Have you noticed blood in their stool? Northeast Veterinary Referral Hospital offers 24/7 emergency services and specialty referral appointments for dogs suffering from a wide variety of health issues, including severe diarrhea. Contact us for more information or ask your primary care vet about a referral.

From Happy Pet Owners

  • Northeast Veterinary Referral Hospital is a kind and caring environment. The Doctor is very knowledgeable and provided us with clear information that helped us make informed decisions.
    John W.

(570) 208-8844