Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Internal Bleeding in Dogs: Causes, Facts & Prognosis (Vet Answer)

sick rottweiler dog at a veterinary clinic

We tend to be more afraid of the things that we can’t see than those that we can. While an open wound on your dog that is gushing blood may be frightful, internal bleeding is actually scarier. Since you can’t see it, it may take longer for a vet to determine the cause and get it under control.

In this article, we share information on how to determine the signs, causes, and other important information about internal bleeding in dogs so you can quickly get your pup the help that they need.

Dogster_Website dividers_v1_Jan 18 2024-01-TEST

What Is Internal Bleeding in Dogs?

Internal bleeding occurs when blood is lost inside a dog’s body rather than outside of it. Unfortunately, the name may be the only aspect of internal bleeding that’s this straightforward.

Blood is required by every tissue in the body as a source of nutrients necessary for survival. When blood is lost from the system, it can severely disrupt this balance, leading to potentially serious problems.

Most of the time, when you think of your dog bleeding, it’s seeing red blood leaking from a wound somewhere on their body. This is external bleeding. Internal bleeding occurs similarly in that blood is being lost from the blood vessels, but instead of spreading outside the dog’s body, it goes into areas inside the body, most often the abdomen and chest.

Since you can’t see the blood coming out to know that your dog is bleeding, you’ll have to rely on other, usually subtler signs that your pup has a problem. Internal bleeding can occur in a few different ways—it may be a small amount over time or a large amount all at once. Both scenarios will be accompanied by similar signs; the difference is how quickly they appear.

Ultrasound image showing showing fluid which may be blood
Image Credit: amdp99, Shutterstock

What Are the Signs of Internal Bleeding in Dogs?

The signs of internal bleeding are a bit similar to those of external bleeding, minus actually seeing red blood. Both are due to the lack of blood reaching places in the body where it’s needed. What you may see with internal bleeding includes:

  • Pale gums and tongue
  • Weakness, lethargy, depression
  • Panting or increased breathing rate
  • Cool skin, especially in the ears, legs, and tail
  • Difficulty breathing
  • Black, tarry stools
  • Vomiting blood or bloody stools
  • Bright red gums
  • Sudden collapse

Seeing any of these signs in your dog is an emergency. See a vet immediately if you suspect that your dog is bleeding internally.

Did you know you can speak to a veterinarian without having to travel? Just head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

What Are the Causes of Internal Bleeding in Dogs?

Sometimes, there’s a major event that leads to internal bleeding in dogs. Other times, you may not know that anything has happened until there’s significant blood loss or your dog starts showing signs of internal bleeding. Here are a few examples of causes of internal bleeding in canines.

1. Trauma

Trauma is at the top of the list of causes of internal bleeding in dogs. This could be blunt force trauma from a fall, car accident, or blow. There may be no outward signs of the injury, just the ones that present from the internal bleeding. It can also be a wound from a bite, gunshot, or puncturing material.

dog with paw injury
Image Credit: Dmitriev Mikhail, Shutterstock

2. Ruptured Masses

Tumors, both cancerous and noncancerous that affect the internal organs in the abdomen and chest can become quite large before they’re detected. Sometimes, they can rupture, leading to internal blood loss. This is often the first sign that a tumor was there in the first place.


3. Ulcers

Ulcers in the digestive system can be a form of internal bleeding in dogs. Not every ulcer will bleed, but some do, potentially a large amount. You may see bright red blood in your dog’s vomit or feces, or you may see black, digested blood in their feces, depending on where the ulcer resides.


4. Bleeding Disorders

If your pup has anything off with their blood’s ability to clot, they may experience internal bleeding. Things like autoimmune diseases, rodenticide toxicity, liver disease, and issues that develop secondary to infection, cancer, or inflammation can lead to abnormal bleeding, potentially internally, because the blood can’t clot and keep the bleeding under control.

an older sick dog lying down
Image Credit: Lindsay Helms, Shutterstock

5. Post-Op Bleeding

Recently undergoing surgery is a potential cause of internal bleeding in dogs. Blood vessels that were once sealed may be reopened, causing blood loss inside the body. This can happen for several reasons, with one of the main ones being too much activity after the operation. Always follow the vet’s recommendations for post-surgical care instructions.

Dogster_Website dividers_v1_Jan 18 2024-01-TEST

How Do I Care for a Dog With Internal Bleeding?

Internal bleeding is an emergency in dogs. There is nothing that you can do at home other than call ahead to the veterinary hospital to let them know that you’re coming in. A vet will take it from there. If your pup is losing a large amount of blood, they will first get them stabilized either with fluid therapy or possibly a blood transfusion. For severe bleeding, emergency surgery may be necessary to get the blood loss stopped.

Once your dog is stable, the work of determining a cause begins. Diagnosing internal bleeding in dogs may require various tests, including blood work and imaging. Additional clotting tests or tissue sampling may be required.

Further treatment may include surgery, continued fluid therapy or transfusions, medications, and supplements to aid in clotting and to treat underlying diseases. Some dogs may need considerable hospitalization time following an internal bleeding episode.

Holding hands with sick and injured dog
Image By: sanjagrujic | Getty Images.

Frequently Asked Questions (FAQ)

How Long Can a Dog Live With Internal Bleeding?

Internal bleeding in dogs can either be a gradual process or a sudden one. When the process is gradual, dogs typically lose a small amount of blood over a long period. These dogs may live weeks or months without anyone noticing anything. For dogs with sudden internal bleeding, the amount of time that they can survive will depend on the amount of blood that’s being lost and how quickly. The greater the blood loss, the shorter the survival time if treatment isn’t undertaken.

Can Internal Bleeding in Dogs Be Cured?

Internal bleeding has no at-home treatments. It requires veterinary attention, and the sooner, the better. Depending on the cause and the amount of blood lost, internal bleeding can be treated and cured. However, certain causes, such as trauma or tumors, may create significant damage that can’t be fixed.

Dogster_Website dividers_v1_Jan 18 2024-01-TEST

Conclusion

Blood loss is blood loss, whether it happens on the outside of the body or the inside. All the tissues in the body rely on a regular supply of blood for survival. This means internal bleeding in dogs is an emergency situation. It’s vital to retain as much blood as possible in the system at all times for a dog’s survival. If you suspect that your dog is bleeding internally, even slightly, see a veterinarian immediately.


Featured Image Credit: Vera Larina, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

3 Responses

  1. I just went though this with my shar pei/lab mix. Only 8.5 years old. He was lethargic for a couple days but then bounced back to his normal self, at least I thought. Then about 2 weeks later I brought him into the vet one night because he was barely moving and started to have body or muscle spasms and was very figdety. They showed me how his gums were pale and they found blood in the abdomen. Unfortunately, he wasn't stable enough to operate. It was heartbreaking to put him down, especially since he seemed to go downhill in just 1 day.

    1. Hi David, I’m so sorry you had to go through that—it sounds absolutely heartbreaking. Thank you for sharing his story—it takes courage, and it might help someone else catch signs they wouldn’t otherwise notice. I hope you can find solace in all of the memories you made together over the years.

    2. This happened to my pooch a few months ago, just lay down in the middle of a walk and didn't want to do anything for the next couple of days, thought it was poisoning, then found out bleeding in the abdomen and the fluid was going around her liver and heart, had to put her to sleep and i don't think it is something i can truly get over, she was 10 half years old, i miss her badly. She was fine a few months ago with no signs of anything. gutted.

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

National Boston Terrier Day 2026: When It Is & How It’s Celebrated

The Boston Terrier is one of the top 25 dog breeds in the United States. They’re intelligent, affectionate, and wonderful with children, and...

36 Akita Mixed Breeds (With Info & Pictures)

The Akita Inu, an ancient working breed native to Japan, is a majestic dog with an air of quiet dignity. Akitas have been...

4health vs Purina Pro Plan Dog Food: 2026 Comparison, Pros & Cons

If you own a dog, you already know the struggle of picking a good dog food. However, as you continue to look around...

How Many Puppies Do Great Danes Have? Vet-Verified Litter Facts

Great Danes are larger dogs, so they tend to have more puppies than the average canine. Generally, larger dogs have more puppies simply...

More related

My Dog Ate Vaseline: When to Worry & Vet-Approved Advice

Some dogs can be extremely curious and treat almost anything as food or toys. Although it doesn’t happen often, a dog can get...

Doberman Pinscher Dog Breed: Info, Pictures, Care & More

The Doberman Pinscher is a working-class dog breed with an intimidating appearance and reputation that precedes them. While the general public often considers...

How Long Do Police Dogs Live? Average Lifespan, Data & Care Guide

Police officers worldwide rely on canine partners to have their backs and assist in a range of difficult and dangerous tasks. From tracking...

How to Start a Pet-Sitting Business in 11 Steps (2026 Guide)

Are you an animal lover who’s considering starting a pet-sitting business? Congratulations! You’re about to embark on an exciting adventure that can bring...

Keep reading

Can Dogs Eat Cat Food? Vet-Verified Info & Safety Tips

When you live in a multi-pet household with dogs and cats, you’re probably used to having to keep your pets from eating each other’s food. Dogs and cats can eat many of the same foods, and a lot of the...

Can Dogs Eat Cat Food

10 Best Dog Foods for Chihuahuas in 2026 – Reviews & Top Picks

Choosing food for Chihuahuas is challenging because they are so small! The average dog food simply won’t work for them, as the kibble will often be much too big. Instead, only the smallest kibble size will do, or you’ll need...

close up Chihuahua eating

5 Vet-Approved Carob Dog Treat Recipes to Make at Home

You know chocolate is toxic to canines, so giving it to your pup is out of the question. But sometimes those begging eyes are so hard to resist! However, while you can’t feed your dog real chocolate, you can feed...

Carob chocolates for dogs

10 Best Dog Foods for Pomskies in 2026 – Reviews & Top Picks

The Pomsky is a mix of a Husky and a Pomeranian. They essentially look like miniature Huskies, and they put the “A” in adorable! These beautiful dogs have become a bit of a social media sensation due to their unique...

young pomsky outdoor

Can Dogs Eat Salsa? Vet Approved Facts & FAQs

Salsa is a spicy relish composed of tomatoes, peppers, herbs, limes, onions, and spices. It’s usually paired with tortilla chips as an appetizer, but it can also be used as a topping or filling for tacos, enchiladas, or burritos. Salsa...

Can Dogs Eat Salsa

Can Dogs Eat Bones? Vet-Approved Health & Safety Guide

Dogs and bones seem to go together like peanut butter and jelly, but is it actually safe or healthy to offer a bone to your dog? While bones can be a good source of minerals and nutrients and clean the...

Can Dogs Eat Bones

How Much Does Nom Nom Dog Food Cost? 2026 Update

If you’re thinking of switching to a freshly-made food subscription this year, it can be hard to find the differences between different subscription options. Many subscriptions are tailored to your dog’s individual needs, including Nom Nom. That’s great, but it...

woman feeding dog with nom nom beef mash

How Long to Withhold Food From a Dog With Diarrhea: Vet-Approved Guide

If your dog has diarrhea, how should you prevent it from worsening? You may have heard that you should withhold food from your dog if they’re experiencing diarrhea, and this recommendation is an excellent start for relieving your dog’s discomfort....

a border collie dog looking sick covered with blanket on couch