Best CBD for Dogs With Cancer at a Glance

  • Best CBD Oil for Dogs with Cancer: Honest Paws CBD Oil
    The best overall CBD for dogs with cancer as it checks all criteria boxes. 
  • Best CBD Treats: Honest Paws CBD Treats
    Palatable treats infused with full-spectrum CBD for dogs with arthritis. 
  • Most Potency Ranges: Penelope’s Bloom
    An array of CBD for dogs with cancer is available at different potency rates. 
  • Best Value: Four Leaf Rover
    Potent, full-spectrum, and all-natural CBD for dogs with cancer. 
  • Food Topper Option: Petly CBD
    Unique CBD for dogs with cancer in the form of delicious food topper. 
  • Best Flavor Range: CBDfx
    Bacon-flavored, broad-spectrum hemp CBD for dogs with cancer. 
  • Best Subscribe and Save Options: Charlotte’s Web
    Appealing and budget-friendly options for CBD for dogs with cancer. 
Honest Paws Well CBD Oil for Dogs
  • Support sensitive skin & seasonal allergies
  • Boost immune system & cognitive function
  • Enhance bone & joint health
  • Promote relaxation & combat stress

How does CBD for Dogs With Cancer Work?


CBD for dogs with cancer works by combating the cancer tumor itself. CBD for dogs with cancer can also help manage its symptoms, and reduces the side effects of conventional cancer treatments. 

The effects of cannabidiol stem from its ability to interact with the endocannabinoid system (ECS). The ECS is present in all mammals and responsible for maintaining a state of health and balance (homeostasis). 

The ECS consists of endocannabinoids, cannabinoid receptors (CB1 AND CB2), and enzymes. CBD replaces endocannabinoids, binding with their receptors and supporting the endocannabinoid system. 

Is CBD Oil Good for Dogs With Cancer?

Yes, CBD oils are good for dogs with cancer. Although the use of CBD for dogs with cancer is relatively new, current knowledge supports it. CBD oil is an extract from the Cannabis sativa plant and classifies as a herbal remedy. Therefore, it is perfectly safe. 

At the moment, CBD for dogs with cancer is not approved for official use in veterinary medicine. However, the Food and Drug Administration (FDA) “recognizes the potential opportunities that cannabis may offer,” and there is plenty of research supporting the use of CBD for dogs with cancer.

Does CBD Shrink Tumors in Dogs?

Yes, it is indicated that CBD for dogs with cancer may help shrink tumors in animal models. A study performed on mice showed that cannabis can reduce tumor growth. In the trial, the mice had breast cancer. 

This is not conclusive proof that the effects of cannabidiol would be the same in dogs and for different types of cancer. However, they show the potential of CBD and inspire further research. 

The Best CBD for Dogs With Cancer

With so many options, finding the right CBD for dogs with cancer can be challenging. To make things easier, we have compiled a list of the best CBD for dogs with cancer (oils, treats, and toppers). 

Honest Paws CBD Oil

Summary: With more than 113K satisfied customers, countless five star-ratings, and 92 media mentions, Honest Paws is a reputable brand offering condition-specific CBD oil. The oil is rich in various cannabinoids, terpenes, and flavonoids and with potent anti-cancer features.


  • Full-spectrum with various concentrations 
  • 100% organic hemp, vegan, and gluten-free
  • Sourced and manufactured in the USA 
  • Certificate of Analysis available 


  • The COA does not test for pesticides 

Review: Pet owners say the Honest Paws CBD oil “works miracles” and “makes a difference.” They are also happy with the brand’s customer service. All in all, Honest Paws has the best CBD oil for dogs with cancer.  


Summary: The Honest Paws line of CBD treats follows the same safety and quality criteria as the CBD oils. The vet-approved CBD soft chews and bites feature dog-friendly flavors and are extremely easy to use. Plus, with 5 mg of CBD per treat, they are simple to dose. 


  • Made with organic, full-spectrum CBD 
  • Available in different flavors and textures
  • Practical and easy to dose and use 
  • Free from harmful ingredients 


  • Occasionally unavailable due to high demand 

Review: Dog owners say their “dogs love” the Honest Paws CBD treats. They are satisfied by how effortless it is to add the treats to the menu. All in all, Honest Paws offers the best CBD treats for dogs with cancer. 


Summary: Penelope’s Bloom focuses on quality, efficacy, and sustainability. Its CBD products are of unmatched quality and safe for both pets and the environment. Its CBD oil is full-spectrum and available in different concentrations. Plus, the oil is vegan, non-GMO, and free from artificial ingredients. 


  • Full-spectrum tincture 
  • Fast efficacy 
  • Rich selection of CBD strengths 
  • Easy to use bottle dropper


  • Does not feature a dog-friendly flavor 

Review: Dog owners describe the Penelope’s Bloom CBD oil as a “game-changer” and “very helpful” product. They are happy with the selection of concentrations. All in all, Penelope’s Bloom offers CBD with the most potency ranges for dogs with cancer. 


Summary: Dogs Naturally beliefs in changing the world one dog at a time. The Four Leaf Rover CBD oil by Dogs Naturally is a full-spectrum CBD oil with human-grade MCT as a carrier. The CBD oil’s anti-inflammatory and anti-pain properties make it a suitable choice for dogs with cancer.


  • Full-spectrum tincture with different potencies
  • Free from harmful chemicals 
  • Extracted with supercritical CO2
  • Certificate of Analysis available 


  • More expensive than similar CBD oils

Review: Pet owners describe the Four Leaf Rover CBD oil as “life-changing.” They are also boosting about the science behind the brand’s CBD products. All in all, Four Leaf Rover is the best value CBD oil for dogs with cancer. 

Petly CBD Topper


Petly CBD is a relatively new brand but with a well-established concept of quality. Petly CBD offers an unusual range of CBD products, including a food topper. The CBD food topper is made with a broad-spectrum CBD tincture and features as much as 20 mg of CBD per scoop. Plus, it is free from grain, corn, soy, wheat, pea flour, etc.


  • Rich in omega fatty acids 
  • Natural bacon-flavor
  • Easy to use and practical 
  • No sketchy ingredients 


  • With broad-spectrum CBD oil 

Review: Pet owners mention that their dogs are “crazy” about the Petly CBD food topper. They are also happy with the practicality and concentration of the product. All in all, Petly CBD offers the best CBD food topper option for dogs with cancer. 


Summary: CBDfx is a reputable brand offering CBD oils and treats with high-quality and proven efficacy. The CBDfx CBD oil is a broad-spectrum, organic, and vegan formula. The oil is human-grade and sourced and manufactured in the US. The array of flavors makes it easy to use in cancer dogs with picky appetites. 


  • Human-grade, organic, and vegan 
  • Variety of dog-friendly flavors
  • Affordable bundle offers
  • 60-day money-back guarantee 


  • With broad-spectrum CBD oil 

Review: Pet owners say the CBDfx CBD oil is “very helpful” and “works great.” They are also happy with the flavor range and convenient bundle offers. All in all, CBDfx offers the best flavor range of CBD for dogs with cancer. 

Charlottes Web - Calm

Summary: Charlotte’s Web dedicates to helping dogs experience the health benefits of plant-based cannabinoids. The Charlotte’s Web CBD treats are delicious and nicely textured. They are made with full-spectrum hemp and natural ingredients. Featuring 2.5 mg of CBD per chew, the treats are ideal for small and medium dogs with cancer. 


  • With full-spectrum CBD tincture 
  • Dog-friendly and natural flavor 
  • Made from US grown hemp 
  • No artificial ingredients and additives 


  • Issues with the customer service 

Review: Pet owners say Charlotte’s Web CBD treats “do the trick.” They also mention they would “buy the product again.” All in all, Charlotte’s Web offers the best subscribe and save options for CBD for dogs with cancer. 

How to Use CBD for Dogs With Cancer

When adding CBD to the anti-cancer strategy, the first thing is to find a high-quality CBD product formulated specifically for pets.  

Human CBD can contain THC (tetrahydrocannabinol), which is toxic to dogs. Therefore, you need to get a pet-specific CBD product made by a trustworthy brand. Once you have found a reputable pet CBD brand, you can choose between different products like oils, treats, and peanut butter. 

In general, CBD oil has a faster onset of action and is more cost-effective, but its bitter taste makes it harder to administer. On the other hand, the CBD treats are extremely easy to use and dose but take effect more slowly and come with heftier price tags. 

CBD Dosage For Dogs With Cancer

Based on the general CBD dosage guidelines for dogs with cancer, you should give your pet between 1 and 5 mg of CBD per 10 pounds of body weight per day. We suggest starting with lower doses and gradually increasing the CBD amount as your dog gets used. If you have any dosage-related concerns, talk to your trusted veterinarian. 

The good news is it is it is highly unlikely to overdose your dog on CBD oil. However, if you give a few extra drops, your dog may develop minor and transient side effects like dry mouth, increased thirst, lethargy, drowsiness, lowered blood pressure, and diarrhea. 

The Benefits of CBD For Dogs With Cancer


The use of CBD in dogs with cancer is relatively new. Luckily, both anecdotal evidence and clinical trials are showing positive results. Here is what science says on the effects of CBD for dogs with cancer. 

CBD Improves Immune Health. The immune system and the endocannabinoid system are intertwined to the point scientist use the term immune cannabinoid system. Cannabidiol gives the immune system a natural boost and promotes gut health. Given the fact that the major part of the immune system is located in the gut, CBD indirectly supports the immune system. Plus, CBD reduces oxidative stress and helps defend against foreign pathogens.  

CBD Supports Anti-Tumor Medication. CBD can enhance the efficacy of mainstream cancer treatments like radiation therapy and chemotherapy. When used with radiation therapy, CBD boosts the tumor-shrinking effects, and when used in conjunction with chemotherapy, it decreases the reproduction of cancerous cells, thus ensuring increased survival rates.  

CBD can Reduce Pain and Inflammation. Pain and inflammation are inevitable in cancer dogs. Pain is debilitating and delays the healing processes, while inflammation supports tissue damage. CBD provides pain relief and has anti-inflammatory features. Plus, it boosts the potency of traditional meds (NSAIDs), thus ensuring pain management without causing severe side effects. 

CBD May Slow the Growth of Cancer Cells. CBD has tumor-shrinking properties, and it can slow down the proliferation of cancerous cells, thus preventing tumor spreading. Cancerous cells have cannabinoid receptors meaning they can be targeted without damaging healthy cells. Similarly, it has been shown that CBD can induce apoptosis or programmed cell death. 

Can CBD Treat Cancer in Dogs?

No, CBD is not a cure for cancer and cannot treat cancer. However, it is the perfect addition on a multimodal anti-cancer treatment. 

CBD helps manage cancer on different levels and improves the dog’s quality of life. Plus, it is perfectly safe and can be combined with other treatments. 

What is the Best Type of CBD for Dogs With Cancer? 

The best type of CBD for dogs with cancer should have the following features:

  • Full-spectrum (rich in cannabinoids, flavonoids, and terpenes)
  • Extracted with CO2 methods from organically grown hemp plants 
  • With hemp seed oil or MCT coconut oil as a carrier 
  • Free from harmful ingredients (artificial additives, allergens, grains)
  • Easy to use (with dog-friendly flavors) and dose. 

The first two choices on our list, the Honest Paws CBD oil, and treats, check all of these boxes. Plus, they are condition-specific and made exclusively for dogs with cancer. 

Treatment Options for Dogs with Cancer

Cancer treatment is delicate and usually requires a multimodal and individually tailored approach for every dog. Below are the mainstream treatment options for dogs with cancer: 

  •  Surgery. This is the cornerstone of cancer treatment in pets and is usually the most effective one. However, not all types of cancer can be surgically removed. Also, surgery is not an efficient option if the cancer is in an advanced stage and with metastasis. 
  • Chemotherapy. The goal of the chemotherapy is to destroy the cancer cells without damaging the healthy ones. It includes the use of anti-cancer drugs, which are given by mouth or as injections following specific protocols. Chemotherapy is expensive and not universally suitable. 
  • Radiation therapy. The concept of radiation therapy is that cancer cells need more time to regenerate after being exposed to radiation than healthy cells. The treatment is divided into several episodes and can be used alone or in conjunction with other anti-cancer options. 

How CBD Compares to Alternative Dog Cancer Treatments

CBD for dogs with cancer is a natural holistic option meaning it is safer and has fewer and lesser unwanted effects and adverse reactions than conventional cancer treatments. 

Also, unlike most treatments, high-quality, full-spectrum CBD for dogs with cancer works on multiple levels – it manages cancer and its symptoms as well as the side effects of cancer treatment, such as nausea, vomiting, and loss of appetite.  

Plus, dog owners should know that CBD for dogs with cancer can be combined with other anti-cancer treatments as part of a multimodal strategy. The CBD will support the dog’s overall health and improve its quality of life. 

Dog Cancer: Signs & Symptoms


The prevalence of cancer in modern dogs is concerning. Statistics show that as much as one in three dogs will develop some type of cancer at a certain point in its life. Not all cancers are equally dangerous and aggressive. However, they all decrease the dog’s quality of life. 

Causes of Cancer in Dogs

The causes of cancer are complex and poorly understood. However, we know that certain factors increase the risk of developing cancer. Such factors include:

  • Genetics (certain breeds are more likely to develop tumors)
  • Nutrition (poor dietary choices, canned foods, additives)
  • Certain pathogens (usually viruses)
  • Hormonal imbalances
  • Exposure to carcinogens (UV lights, pesticides, smoke, asbestos). 

Most Common Types of Cancer in Dogs

There are different types of canine cancer, with some being more common than others. Here is a short review of the most common types of cancer in dogs:

  • Bone cancer – also known as osteosarcoma, usually affects the limbs but the skull, spine, and ribcage are also at risk. It is more common in large and giant dog breeds.  
  • Hemangiosarcoma – attacks the blood vessels of the spleen and is prone to rupturing and causing fatal internal bleeding. It is more common in older, medium to large dogs. 
  • Lymphoma – accounting for 15-20% of cancer cases, it is the third most common canine cancer type. It affects the lymphoid tissue and lymphocytes.   
  • Melanoma – aggressive, fast-spreading tumor of the pigmented skin cells (melanocytes). It is one of the few cancers visible on the outside as dark spots on the skin. 
  • Mast cell tumors – quick-spreading and metastasizing cancer of the mast cells usually on the dog’s skin. It is among the most malignant and aggressive canine cancers. 

Signs Your Dog has Cancer and What to do

Different types of cancer trigger different signs and symptoms. However, some signs are non-specific and can be seen with different cancers. Here are some of the usual cancer signs in dogs:

  • Lumps and bumps 
  • Enlarged lymph nodes 
  • Unusual swelling 
  • Sores that do not heal
  • Bleeding and discharges 
  • Loss of stamina
  • Appetite changes. 

Pet owners need to be aware that these signs are not always striking or become apparent in the later stages. Therefore, it is critical to call the vet as soon as there is something unusual going on with the dog. When it comes to canine cancer, early diagnosis is vital for treatment.