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.

What To Do When Your Dog Has Cancer: Our Vet Discusses 6 Important Steps

Share

woman snuggling and hugging her basenji dog

If you’ve been told your dog has cancer, you know the gut-wrenching feeling that comes with it. You may have been so overwhelmed when you got this news that you took in little of the vital information you need to decide what happens next. Cancer is an abnormal growth of an individual’s cells, which multiply and spread uncontrollably.

This can lead to problems almost anywhere in the body. This uninhibited growth is caused by mutations in the cell’s DNA; mutations happen all the time, but if you are unlucky, one will cause cancer. Cancer can happen in dogs of any age, but it is much more common in older dogs over 10 years old due to the links between cancer and aging.

Almost half of dogs over 10 years old will die from cancer.  Some breeds, like Boxers, Bernese Mountain Dogs, and Golden Retrievers, are also more prone to cancer. When your dog has cancer, there are a few steps you must take, and you need to make some decisions based on your circumstances. Read on for more details.

Dogster divider_v3_NEW_MAY_24_

The 6 Steps to Follow When Your Dog is Diagnosed With Cancer

1. Verify the Diagnosis

Each type of cancer is given a name based on the type of cell that turned cancerous, the organ it came from, and how aggressive the growth is. For example, with a tumor originating from liver cells, we could call it a hepatocellular (liver cell) adenoma if it is benign or a hepatocellular adenocarcinoma if it is cancerous. The diagnosis is given once your vet has sent the lump for testing at a veterinary diagnostic lab.

Once we have the diagnosis, we can predict the likely outcome of the cancer based on how this cancer typically behaves in dogs. Knowing the expected outcomes or “prognosis” for your dog’s type of cancer is extremely important, as it’s going to help you make some decisions in the near future.

Dogs with aggressive mammary tumors usually live for less than one year, but several other traits impact the survival time. Dogs with low-grade soft tissue sarcoma live for years, whereas for high-grade tumors, the average survival time is less than a year.

Most dogs with grade I mast cell tumors will survive 1,500 days, whereas, for grade III, only 6% made it that long. As you can see, the information from the lab makes a huge difference, so if you haven’t already, you need to get a diagnosis.

veterinarian examining Great Dane on cancer in vet clinic
Image Credit: Lucky Business, Shutterstock

2. Consult a Veterinary Oncologist

Veterinary oncologists are vets with post-graduate training and specialize in cancer treatments for pets. Before being certified, oncologists need years of training and have to pass difficult exams. In the US, oncologists are registered through the American College of Veterinary Internal Medicine. Your primary care veterinarian will likely refer you to a nearby veterinary oncologist. You can also search for veterinary oncologists in your area here.

An oncologist works with your primary care vet or other specialists, like surgeons, to organize care for your pet. They will usually have access to advanced imaging like CT or MRI and more specialized drugs and equipment.

Oncologists can treat pets with chemotherapy and radiation. Their goal is to balance your pet’s quality of life with effective cancer treatments. They know the common side effects of cancer treatment and can monitor and adjust therapies as needed. For a given type of cancer, there are usually multiple treatment options with different risks and benefits.

Even if you are not 100% sold on following up with advanced treatments, it’s helpful to talk to an oncologist. They have a vast knowledge base and can give accurate treatment, prognosis, and pricing information.

If you are far from a vet clinic and need urgent vet advice and guidance on the best course of action you can chat with a vet online.

If you need to speak with a vet but can't get to one, 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


3. Decide Whether to Get Specialist Treatment

In this area, there is no one-size-fits-all answer. First, you must look objectively at your pet’s disease and likely survival time, even with the gold-standard treatment. Then, you should consider other problems your pet has, their current health, and whether they are already ill from their disease.

You should take into account their age and the average lifespan of their breed. If your pet hates going to the vet, they might not cope well with regular cancer treatment. The final factor that will play into your decision is the resources you have available for your pet’s treatment.

The cost of the treatment is one side of it, and your oncologist should give you a good idea of the costs and whether they are likely to be ongoing or one-off. There are different payment options like loans or crowdfunding available.

If you are fortunate enough to have taken out pet insurance, you should contact your company to see how much of the costs they will cover. Cancer treatment also takes a time investment on your part. You must manage your pet’s numerous appointments and monitor them closely for side effects at home.

Keep in mind that “average survival times” do not guarantee your dog will live for that long. For every dog that lives longer than average, there is one that passes away sooner.

woman-and-sick-old-german-shepherd-at-veterinarian
Image Credit: Beach Creatives, Shutterstock

4. Consider Palliative Care

There are a few reasons you might decide not to pursue specialist treatment for your dog:

  • Poor prognosis
  • Pet’s health or behavior
  • Personal/ family circumstances

Whatever the reason, know that palliative care is a valid choice. Palliative care aims to keep your dog as comfortable as possible in their last days. Medications like pain relief, anti-inflammatories, and anti-nausea drugs can keep your pet happy in the short term.

You can also install ramps and give your dog a comfortable orthopedic bed to make their life more pleasant. Nutritional support is also a form of palliative care. You should talk to your vet about what palliative care interventions will improve the quality of your pet’s life. Give your dog plenty of love and support at this time.

Keep them involved in family life. Place their bed in a comfortable, busier area like the living room. If they can’t go on walks, you can push them around in a cart or pram. Clean and brush them regularly, keep their coat clean, and check them for pressure sores. Follow your vet’s instructions and contact them if you have any questions.


5. Look Into Holistic Treatments

Holistic treatments focus on the whole dog, not just their disease. However, be aware of the vast amount of misinformation on the internet and instead seek advice from your vet. Avoid raw diets since your dog’s immune system is likely to be suppressed at this time, and raw food brings a burden of parasites and bacteria that you are better off avoiding.

You may need to switch to a veterinary prescription diet or a tastier food if your pet has a poor appetite. Make dietary changes gradually to avoid gastrointestinal upsets. Acupuncture and massage therapies can help ease pain in cancer patients.

Omega-3 fatty acids have improved survival time in dogs undergoing chemotherapy for lymphoma. In dogs with hemangiosarcoma, Polysaccharopeptide (PSP) found in turkey tail mushrooms improved survival time.

Chihuahua Dog eating in a food bowl
Image Credit: Kyrylo Vasyliev, Shutterstock

6. Monitor Your Dog’s Quality of Life

Everyone hopes that when it comes time for their pet to pass away, they will do so peacefully, at home, in their sleep, without any suffering. Unfortunately, this rarely happens, and the dying process in pets can be drawn out and distressing. At the end of the day, if your dog isn’t enjoying their life, you don’t want to prolong it.

You want their last moments to be happy and not wrought with suffering. That is why most people choose to euthanize their dog when their quality of life declines. Some vets specialize in euthanasia and perform house calls to ensure your pet is as comfortable as possible during the process. But how do you know when it’s time to make that decision?

Some signs that quality of life is declining include:
  • They can’t see, which is causing them to have accidents or be anxious.
  • They don’t want to interact with the family as much as usual.
  • They have trouble walking around.
  • They are incontinent.
  • They are not eating or nauseous despite medications.
  • Eating seems difficult for them.
  • They are in pain despite pain relief.
  • They can’t breathe well.
  • They have lots of seizures.
  • They keep getting dehydrated.
  • Their coat can’t be maintained in good condition.
  • They have an oozing, smelly, or bleeding tumor.
  • They no longer enjoy the things they used to.
  • They have more bad days than good ones.
  • They appear frustrated.

You may instinctively know when it’s the right time to say goodbye, but if you’re not sure, your vet can help you make the decision.

Dogster divider_v3_NEW_MAY_24_

Conclusion

A cancer diagnosis is devastating but, unfortunately, common in older dogs. We know that doesn’t make the difficult decisions ahead any easier. Some cancers are worse than others, and some even have a fair prognosis, so it’s essential to understand the type of cancer you are dealing with. Whether your budget for treatment is small or large, your dog’s quality of life should always come first. We wish you all the best on this journey with your dog.

See Also:


Featured Image Credit: Klymenok Olena, 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

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

Ask Dr. Paola- Help! My Dog’s Sleeping Habits Have Changed! (May 18, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

The Crate Setup Most Dog Owners Get Wrong (And How To Fix It!)

Most people assume that if their dog hates the crate, the crate is the problem. So they try a bigger one, a different...

1,500 Beagles Rescued from Wisconsin Lab Farm – Here’s Where They’re Going

You may remember that a few weeks ago, we reported on a tense situation at Ridglan Farms, Wisconsin, a facility infamous for housing...

Dogster’s Weekly Photo Contest Winners: Window Watchers (May 11, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

More related

Can a Labradoodle Be Left Alone? Considerations & Vet-Approved Tips

The Labradoodle is a mix of a Poodle and a Labrador Retriever, so they have the qualities of both breeds. They have the...

How to Draw a Puppy: Our Vet’s Step-by-Step Instructions (with Video)

If you adore puppies and also like to draw puppies, we have something in common. Full disclosure: I am a vet, not an...

13 African Dog Breeds: Domesticated & Wild Canines (With Info & Pictures)

When we think of the animals of Africa, we usually picture elephants, giraffes, gazelles, and big cats. We don’t often realize that many...

Are German Shepherds Good With Kids? Vet-Approved Safety Tips & Considerations

German Shepherds have had a reputation as dogs that are not the best choice for a pet around children. Many people wonder if...

Keep reading

Can Dogs Eat Green Beans? Vet-Approved Feeding Facts

Our canine companions are excellent at sneaking food off our plates or out of our hands, but human food isn’t always the best for them. Sometimes, our food has more fat and sodium than our dogs need, while other times,...

Can Dogs Eat Green Beans

Can Dogs Eat Purple Sweet Potatoes? Vet-Verified Facts & Alternatives

Purple sweet potatoes are a delicious treat for us, and when we’re chowing down on them, it’s common for our pups to start begging for some. So, Can dogs eat purple sweet potatoes or should this be avoided? The truth...

Can Dogs Eat Purple Sweet Potatoes

Can Dogs Eat Blueberry Muffins? Vet-Verified Nutrition Facts & Alternatives

Dogs can enjoy many foods that humans eat, and they’re experts at convincing us to share our food with them. Since they can eat many fruits and vegetables that humans also eat, it’s best to choose healthier options than junk...

Can-Dogs-Eat-Blueberry-Muffins

12 Best Dog Foods for Hunting Dogs in 2026 – Reviews & Top Picks

Various dog breeds make excellent hunting dogs. Labrador Retrievers, Mountain Curs, Vizslas, and even Beagles are just a few examples of perfect hunting companions. Although these dogs look completely different in color, size, and structure, they share the same instinctual...

owner feeding two hungry dogs

Best Canned Pumpkin for Dogs: Our Top 6 Picks in 2026

Pumpkin isn’t just an autumn treat anymore—especially when it comes to your dog. Canned pumpkin is a popular treat and dog food topper, and many dogs can’t get enough of it! It’s also a healthy superfood that has many benefits...

Dog beside Pumpkin

11 Best Dog Foods for Dalmatians in 2026 – Reviews & Top Picks

We’re just dotty about Dalmatians! The perfect dog for children, Dalmatians are loyal, playful, and affectionate. As Disney royalty, they stand out among all other breeds with their unique white and black spotted coat. With all the different types of...

Dalmatian dog eating

Wysong Dog Food Review 2026: Recalls, Pros & Cons

Review Summary Wysong is one of the most popular premium dog food brands on the market, producing a wide range of supplements and dog foods. The brand promotes its products as holistic and healthy, with the goal of replicating a...

Dogster_Wysong Dog Food Review

Do Foxes Attack and Eat Dogs? How to Avoid Danger in Your Backyard

Foxes are rather common creatures, found in both rural settings and more populated areas like towns and even major cities. They’re wily creatures and have a reputation for making messes that they often didn’t actually create, though these scavenging predators...

red fox walking on wet street

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter