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

21 American Dog Breeds: Info, Pictures & Origin

Dogs are bred all around the world, lending to the rich cultures and diversities of each region. When it comes to the U.S.,...

10 Best Dog-Proof Trash Cans in 2025 – Reviews & Top Picks

A common challenge that many dog owners face is keeping dogs out of the trash, especially when it comes to kitchen trash cans...

8 Best Dog Backpack Carriers for Hiking in 2025 – Reviews & Top Picks

We know how important it is to find the right hiking backpack. And if you’re carrying a dog? You’ll need something with extra...

Gastroenteritis in Dogs: Causes, Signs & Treatment (Vet Answer)

As a dog owner, you have probably dealt with your dog having some vomiting and diarrhea on at least one occasion. Gastroenteritis, or...

More related

10 Bloodhound Mixes: Info, Pictures & History

Who doesn’t love a cute and unique mixed puppy? It’s always a surprise to see what they’ll look like! Have you heard of...

12 Indoor Exercises for Dogs (Vet Approved)

We all know what it’s like to get a little stir-crazy after being stuck in the house because the weather is bad. Our...

Is a Labradoodle a Mutt or a Designer Dog? Vet-Verified Differences

While you might not care much about definitions of designer dogs and mutts when you are looking for your ideal pup, the price...

Can Dogs Eat Candy Canes? Vet-Approved Facts & Safety Guide

Candy canes are fun and tasty seasonal treats that appear everywhere around the winter holiday season. If you have cats or kids, it’s...

Keep reading

Sources of Omega-3 for Dogs & How Much They Need Daily (Vet Approved)

Dogs need a wide variety of nutrients for a healthy and active life, especially nutrients that play important roles in brain function and immune system health. Omega-3 fatty acids have received lots of attention due to their anti-inflammatory effects which...

Shiba Inu dog eating from stainless steel bowl

Is There Beer for Dogs? Vet-Verified Types, Info & FAQ

When we go to restaurants, we’re usually given multiple drink options, while dogs are typically served water. However, many dog-friendly bars and restaurants have gotten creative over the years and have added beer for dogs to their menus. You don’t...

dog owner beer

Is Corn in Dog Food Bad? Vet Approved Ingredient Guide

Corn is a controversial ingredient that is used in a lot of commercial dog foods. It is very much a normal dog food ingredient in grain-inclusive diets and has been for quite some time. In fact, according to The Institute...

lots of corn

8 Best Puppy Foods for Medium Breeds in 2025 – Reviews & Top Picks

Shopping for the right food for your new puppy can be a bit overwhelming. Any dog lover knows that the food choices on the market today are seemingly endless. Even if you’re a brand-new dog owner, all you have to...

cocker spaniel in grass field

10 Best Dog Foods in Canada in 2025: Reviews & Top Picks

Choosing the right dog food can be a difficult task. There are countless brands and options on the market, so knowing which will be the healthiest is hard. While you might be tempted to choose the first food you see...

Hunting dog eating

Can Dogs Eat Hibiscus? Vet Approved Facts & FAQ

When growing plants in our garden, many dog lovers aren’t aware of the possible toxicity our beautiful plants have which can harm our pets. Hibiscus is a type of perennial flowering plant that adds beauty to many gardens and is...

Can Dogs Eat Hibiscus

Can Dogs Eat Fried Chicken? Vet-Verified Risks, Alternatives & FAQ

The hot pop of frying chicken sends dogs flying from the sofa just as easily as a tantalizing takeout box from your favorite chicken chain. It may be finger-licking good, but is it safe and healthy for your dog? Unfortunately,...

Can Dogs Eat Fried Chicken

Can Dogs Eat Pizza? Vet-Verified Nutrition Facts & FAQ

Pizza is undoubtedly a staple in the US, with more than 6,000 slices consumed in a person’s lifetime. That’s a lot of pizza! Since pizza is such an American favorite, dog owners know that pizza is a coveted food item...

Can Dogs Eat_Pizza