Pet Cancer Awareness Month: How Nutrition May Support Your Dog's Long-Term Health

Written by Dr Hannah Godfrey PhD Animal Nutrition 

Pet Cancer Awareness Month is a good time for dog parents to think about the everyday choices that shape long-term wellness. Routine veterinary care, healthy weight, regular exercise, and a complete and balanced diet all play a meaningful role.

There is no guaranteed way to prevent cancer in dogs. Cancer is complex, and no single food or ingredient can eliminate the risk. What research does suggest is that certain nutrients may support the systems involved in your dog's long-term health¹, including immune function, digestive health, and the body's ability to manage oxidative stress.

If you are exploring gently-cooked dog food as part of your dog's wellness routine, understanding the role nutrition plays is a good place to start.

How Nutrition May Support Dogs During Pet Cancer Awareness Month

Nutrition cannot guarantee cancer prevention, but a complete and balanced diet can help support the systems involved in long-term health, including antioxidant protection, immune function, digestion, and healthy inflammatory responses.¹

One key factor is oxidative stress. Reactive oxygen species (ROS) are molecules naturally produced during normal cellular processes¹.  When the body cannot neutralize them effectively, oxidative stress can occur, potentially damaging DNA, proteins, and other cellular structures over time.

Several factors can contribute to oxidative stress in dogs:

• Exposure to pollutants or radiation

• Chemical exposures

• Poor diet

• Chronic inflammation

• Weakened immune function

Research on the connection between nutrition and oncology in dogs points to diet quality, body condition, and individualized nutritional planning as important factors in long-term wellness management.¹

10 Nutrients and Ingredients That May Help Safeguard Your Dog's Health

These nutrients and ingredients are not cancer treatments and should not replace veterinary care¹. They are included because they have been studied for roles related to antioxidant activity, inflammation balance, immune support, gut health, or general wellness.

Antioxidants May Help Protect Cells From Free Radical Damage

Antioxidants are compounds that may help protect cells from free radical damage and oxidative stress. Common antioxidants include vitamins A, C, and E, as well as selenium, zinc, and beta-carotene.²

Whole food sources include berries, citrus fruits, leafy greens, and carrots. Including a variety of antioxidant-rich ingredients in your dog's diet supports overall health and cellular resilience.

Omega-3 Fatty Acids May Support a Healthy Inflammatory Response

Omega-3 fatty acids are essential for overall health and have been studied for their role in supporting healthy inflammatory responses¹. Sources include salmon, tuna, flaxseed, and hemp seed oils.

Inflammation support is one of the primary areas where omega-3 fatty acids for dogs have shown the most consistent research interest.

Curcumin From Turmeric May Support Antioxidant and Inflammation Balance

Curcumin is the active compound in turmeric. It has been studied for its antioxidant and anti-inflammatory properties, with research suggesting a role in supporting cellular health and inflammation balance.²

The Coconut Chicken* includes turmeric as part of a complete and balanced gently-cooked recipe, made with whole-food ingredients and zero preservatives.

Probiotics May Support Gut Health and Immune Function

Probiotics are beneficial bacteria that may help support digestive health and immune function. The gut plays a significant role in immune regulation, making gut health an important pillar of overall wellness.

Research on probiotics for dogs and their direct relationship to long-term disease prevention is still emerging. What is consistent is that a healthy dog microbiome may contribute to a well-functioning immune system.

Vitamin D May Support Overall Health and Normal Immune Function

Vitamin D is essential for immune function and overall health. Some studies have looked at the relationship between vitamin D for dogs and certain cancers, including lymphoma, though no direct prevention claims can be made at this time.¹ 

Whole food sources include fatty fish like salmon and mackerel, egg yolks, and fortified foods. Vitamin D should not be supplemented without veterinary guidance, as excess amounts can be harmful to dogs.¹

Quercetin May Support Antioxidant and Cellular Health

Quercetin is a flavonoid found in apples, broccoli, and other fruits and vegetables. It has antioxidant and anti-inflammatory properties. Quercetin has been studied in cancer cell research for its effects on cell growth, but this does not mean it prevents cancer in dogs.³

Beef & Broccoli* includes broccoli as part of a complete and balanced recipe made with whole-food ingredients.

Lycopene May Support Antioxidant Protection

Lycopene is a carotenoid found in tomatoes, watermelon, and other red fruits and vegetables. It has been studied for antioxidant activity and its potential role in supporting long-term health across a range of conditions.⁴

Italian Beef Pasta includes tomato, a source of lycopene, within a gently-cooked complete and balanced meal.

Polysaccharides May Support Immune and Gut Health

Polysaccharides are a type of carbohydrate found in ingredients such as shiitake mushrooms. Some polysaccharides have been studied for immune-related and antioxidant activity, but more research is needed before making direct claims in dogs.⁵

They represent a growing area of interest in functional ingredients for dog health.

Gingerols and Shogaols May Support Healthy Inflammatory Responses

Gingerols and shogaols are the active compounds in ginger. Both have been studied for antioxidant and anti-inflammatory properties. Ginger compounds should be understood as supportive ingredients rather than cancer treatments, and research in this area continues to develop.⁶

Ginger has a long history as a functional food ingredient used across many cultures worldwide.

Lutein May Support Antioxidant and Eye Health

Lutein is a carotenoid found in broccoli, kale, spinach, squash, and cabbage. It has been studied in human nutrition research for antioxidant activity and its role in supporting long-term health, including eye health.⁷

Leafy greens for dogs are a reliable source of lutein and other carotenoids that contribute to overall wellness.

Why Complete and Balanced Nutrition Matters More Than Individual Ingredients

No single ingredient or supplement is a shortcut to long-term health. Nutrients work best as part of a complete and balanced diet, not in isolation.

Adding turmeric, vitamin D, oils, or mushroom extracts to your dog's meals without veterinary guidance can do more harm than good. Some supplements interact with medications, and others can become unsafe at high doses.

Key points to keep in mind:

• Dogs need balanced nutrition, not isolated ingredients

• Supplements can interfere with medications or become toxic in excess

• Dogs with existing health conditions need individualized nutritional guidance

• Nutrition supports health but does not replace diagnosis, treatment, or veterinary monitoring

Research on nutrition and oncology in dogs consistently supports the value of diet quality, healthy body condition, and individualized nutritional planning as part of long-term wellness.¹

When to Talk to Your Veterinarian About Diet and Cancer Risk

Always talk to your veterinarian before making major changes to your dog's diet, especially if your dog has symptoms, a current diagnosis, or is already receiving treatment.

Situations where a veterinary conversation about diet is important:

• Unexplained weight loss

• Loss of appetite

• New lumps or bumps

• Vomiting or diarrhea

• Low energy or lethargy

• Existing cancer diagnosis

• Current medications or supplements

• Senior dogs with changing nutritional needs

Nutrition can be a meaningful part of long-term wellness planning, but it works best alongside professional veterinary care, not as a replacement for it.

Support Your Dog's Long-Term Health With Tom&Sawyer's Gently-Cooked Meals

Pet Cancer Awareness Month is a reminder that what goes in the bowl every day adds up over time. Nutrition is one of the most consistent tools available to dog parents, and small, daily choices matter for long-term wellness.

Tom&Sawyer® gently-cooked meals are complete and balanced, made with whole-food ingredients, and prepared in a federally inspected human grade facility. Recipes like Coconut Chicken, Beef & Broccoli, and Italian Beef Pasta bring together nutrient-rich whole foods, including turmeric, broccoli, and tomato, as part of meals that meet AAFCO nutrition standards. Every recipe includes whole foods, zero preservatives, and minimal additional supplementation.

Feeding your dog well does not have to be complicated. Complete and balanced gently-cooked meals make it easier for dog parents to offer high-quality nutrition every day, supporting happier, healthier, longer lives™.

 

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* currently available in Canada only

References

1. Amaral AR, Finardi GLF, Marchi PH, de Oliveira NMC, Príncipe LA, Teixeira N, et al. Connection between nutrition and oncology in dogs and cats: perspectives, evidence, and implications — a comprehensive review. Front Vet Sci. 2025;11:1490290. doi: 10.3389/fvets.2024.1490290

2. Gupta et al. Nutraceuticals in veterinary medicine. Cham, Switzerland: Springer; 2019 May 21.

3. Jeong et al. Effects of low dose quercetin: Cancer cell-specific inhibition of cell cycle progression. J Cell Biochem, 2009; 106(1): 73-82.

4. Saini et al. Protective effects of lycopene in cancer, cardiovascular, and neurodegenerative diseases: An update on epidemiological and mechanistic perspective. Pharmacol Res, 2020; 155.

5. Zhang et al. Review of isolation, structural properties, chain conformation, and bioactivities of psyllium polysaccharides. Int J Biol Macro, 2019; 139: 409-420.

6. Prasad & Tyagi. Ginger and its constituents: Role in prevention and treatment of gastrointestinal cancer. Gastroenterol Res Pract, 2015; doi:10.1155/2015/142979

7. Ribaya-Mercado et al. Lutein and zeaxanthin and their roles in disease prevention. J Am College Nutr, 2004; 23(supp 6):567-587.