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If your senior Newfoundland is beginning to slow down, the right nutritional support can help them stay comfortable, active, and healthy. The best supplements for a senior Newfoundland can promote joint health, mobility, digestion, immune function, and overall wellness during their golden years. This guide highlights top supplement options to help you choose products that meet your gentle giant’s changing needs and support a better quality of life.

Best Senior Newfoundland Supplements

1. Glucosamine & Chondroitin for Supporting Your Senior Newfoundland’s Aging Joints

Joint pain and arthritis are some of the most common ailments an aging Newfoundland will face. Supplements containing glucosamine aid in replacing lost joint fluid, providing much-needed lubrication and cushioning to stiff, achy joints. Chondroitin sulfate has been shown to improve the structural integrity of joints by repairing damaged cartilage and preventing further cartilage breakdown.

You can learn more about the glucosamine and chondroitin supplement iHeartDogs recommends here.

2. Probiotics for Immune & Gut Support for Your Senior Newfoundland

Probiotics are supplements containing large doses of microorganisms. They promote a healthy GI tract by allowing the “good” bacteria in the gut to flourish. “Bad” bacteria often accumulate due to stress, illness, and prolonged use of medications. Since the majority of your senior dog’s immune system is located in the gut, probiotics also help to maintain health throughout the body.

iHeartDogs Pupkin Probiotics, Prebiotics, & Postbiotics is a complete daily digestive supplement designed to support healthy digestion, firmer stools, and immune function. It combines 3 billion CFU of probiotics across four beneficial strains with prebiotics and postbiotics to help nourish beneficial gut bacteria and maintain a healthy intestinal environment. Pumpkin provides a natural source of fiber to help regulate bowel movements, while digestive enzymes promote better nutrient absorption. The formula also includes bone broth to help support the digestive tract and turkey tail mushrooms for additional immune support, making it an excellent daily choice for dogs with sensitive stomachs or aging digestive systems.

3. Honey Guard – Allergy & Itch Omega 3-6-9 Powder

As Newfoundland dogs grow older, maintaining healthy skin and a soft, shiny coat can become an important part of their overall wellness routine. Honey Guard Allergy & Itch Omega 3-6-9 Powder is a great option for senior Newfoundlands because it provides a blend of Omega 3, 6, and 9 fatty acids, including pure Antarctic krill oil, to support healthy skin and coat condition. It also helps maintain normal skin moisture and provides nutritional support for dogs that experience seasonal or environmental allergies. The convenient powder formula mixes easily into food, making it especially useful for senior dogs that may be picky eaters or have difficulty chewing supplements.

This supplement fits well into a daily health plan for an aging Newfoundland by offering targeted skin and coat support alongside a balanced diet and regular veterinary care. Every purchase also helps feed shelter dogs, making it a choice that benefits dogs beyond your own companion. If skin and coat health are a priority for your senior Newfoundland, Honey Guard Allergy & Itch Omega 3-6-9 Powder is worth checking out.

4. Milk Thistle for Your Newfoundland’s Liver & Kidney Support, Especially for Dogs Taking Pain Meds

Natural milk thistle is said to protect the liver from damage and may actually improve liver function. This is important for aging Newfoundlanders, especially those with existing liver problems and those taking medications known to be taxing on the liver. For example, any dog regularly taking an NSAID pain medication such as carprofen, Novox, Rimadyl, deracoxi, Deramaxx, firocoxib, Previcox, meloxicam, Metacam, grapipant, or Galliprant may need additional liver support. Make sure to discuss this with your vet.

5. Curcumin (from Turmeric) for Pain & Inflammation

This “wonder spice” is a derivative of turmeric and promotes brain and joint health in aging newfoundlands. Some studies have suggested that turmeric can provide nearly the same pain relief as an NSAID drug. Lastly, curcumin is also known for its possible anti-tumor properties and for helping to support dental health.

Many high-quality hip and joint supplements, such as this one, contain turmeric in the formula.

6. Hemp Oil for Your Senior Newfoundland’s Pain & Inflammation

No discussion of senior dog supplements would be complete without discussing hemp. In the last 5 years, several studies have begun to show great promise for hemp in helping to alleviate joint pain, calm nervous dogs, reduce inflammation caused by allergies, and reduce seizures in epileptic pups.

We’d recommend a hemp oil or hemp chew that contains 0% THC, as well as using a product that is tested multiple times throughout the manufacturing process to ensure a pure and potent product. Here at iHeartDogs, we only sell and recommend the Cannanine brand.

7. Fiber for Your Senior Newfoundland’s Digestive Health

Senior dogs may experience changes in the lining of the intestines, which lower their ability to digest and absorb the nutrients in their food. Adding healthy fiber to your older pup’s diet supports a healthy digestive system, combats constipation, and promotes overall health.

8. Extra Protein for General Newfoundland Aging Support

As your Newfoundland’s body ages, it breaks down muscle and tissues at a faster rate than before. For this reason, aging dogs need extra protein in their diet (note: there are some exceptions, such as if your senior dog has chronic kidney disease, in which your vet may recommend a lower protein diet).

Many senior Newfoundland parents opt to add additional protein to their dog’s kibble, such as a cooked or raw egg, chicken breast, or a freeze-dried dog food topper. Surprisingly, most kibbles only contain around 20-30% protein, so boosting this vital nutrient can be very helpful for seniors. It can also substantially help their appetite!

9. Dog-Safe Mushrooms such as Shiitake, Turkey Tail, & Reishi for Immune Boosting Support

Mushrooms are an incredibly exciting area of emerging nutritional studies. Some clinical trials have shown great promise in extending the lifespan of dogs battling cancer. And while it’s not a miracle, mushrooms like Reishi, Turkey Tail, and Shiitake can undoubtedly boost the immune system of your Newfoundland.

As you are probably aware, many mushrooms can be toxic to dogs, especially those found in your yard. Make sure to use a dog-safe mushroom supplement if you choose to give one to Fido. This particular formula contains 6 different mushrooms, as well as organic chicken bone broth. 

10. Collagen-rich bone Broth, which supports healthy joints and skin in seniors

One of the biggest causes of early death in Newfoundland is reduced mobility. Bone broth is packed with joint-supporting nutrients like glucosamine, chondroitin, and collagen, all of which help keep your older pup mobile longer. In addition, most senior dogs LOVE the flavor, and it will boost the nutrition and taste of their current food.

The product iHeartDogs recommends and sells contains both bone broth and 6 different immune-supporting mushrooms.

FAQs About the Best Supplements for a Senior Newfoundland

1. What supplements are most important for senior Newfoundlands?

Senior Newfoundlands benefit most from joint support supplements (like glucosamine and chondroitin), omega-3 fatty acids, probiotics, antioxidants, and vitamins that support heart and cognitive health.

2. Why do senior Newfoundlands need supplements?

As large breeds age, they often experience joint stiffness, mobility issues, digestive challenges, and cognitive decline. Supplements help manage these issues, improve quality of life, and support overall health.

3. Are joint supplements necessary for senior Newfoundlands?

Yes. Joint supplements containing glucosamine, chondroitin, MSM, or green-lipped mussel can ease stiffness, protect cartilage, and promote better mobility in senior Newfoundlands.

4. How can omega-3 fatty acids help my senior Newfoundland?

Omega-3s (from fish oil or krill oil) reduce inflammation, support joint health, improve skin and coat condition, and promote heart and brain function in aging dogs.

5. Do probiotics benefit older Newfoundlands?

Absolutely. Probiotics aid digestion, balance gut bacteria, improve nutrient absorption, and can reduce digestive issues common in senior dogs.

6. What vitamins are essential for a senior Newfoundland?

Key vitamins include Vitamin E (for immune and skin health), Vitamin C (antioxidant support), and B-complex vitamins (for energy and metabolism).

7. Can supplements improve my senior Newfoundland’s mobility?

Yes. Supplements with glucosamine, chondroitin, MSM, turmeric, or green-lipped mussel can significantly improve mobility and reduce discomfort from arthritis or hip dysplasia.

8. Do senior Newfoundlands need heart health supplements?

Yes. Large breeds like Newfoundlands are prone to heart issues. Supplements with taurine, L-carnitine, and omega-3s support cardiovascular function.

9. Can supplements help with cognitive decline in senior Newfoundlands?

Yes. Supplements with DHA, antioxidants, and phosphatidylserine can improve memory, alertness and reduce signs of canine cognitive dysfunction.

10. Are there supplements for my Newfoundland’s skin and coat?

Omega-3 fatty acids, biotin, and zinc promote a shinier coat, reduce shedding, and help with skin dryness or irritation.

11. Should I give my senior Newfoundland a multivitamin?

Yes, if recommended by your vet. A canine multivitamin ensures your dog gets balanced nutrients, especially if they are a picky eater or on a restricted diet.

12. Can senior Newfoundlands take turmeric or curcumin supplements?

Yes. Turmeric and curcumin have natural anti-inflammatory properties that can ease joint discomfort and support overall wellness.

13. Are there natural supplements for senior Newfoundland dogs?

Yes. Options like green-lipped mussel, turmeric, bone broth powder, and herbal blends can provide natural support for joints, digestion, and immunity.

14. How do I choose the right supplement brand for my senior Newfoundland?

Look for brands that use high-quality ingredients, have third-party testing, have positive reviews, and are specifically formulated for large-breed or senior dogs.

15. Should I consult a vet before giving my senior Newfoundland supplements?

Always. A veterinarian can recommend the right supplements, proper dosages, and ensure there are no interactions with medications or health conditions.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. The information on this website is not intended to replace a one-on-one relationship with a qualified healthcare professional.

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Choosing the Best Supplements for a Senior Newfoundland

As Newfoundlands age, their nutritional needs change, making the right supplements an essential part of their daily care. From joint support to digestive health and immune-boosting formulas, high-quality supplements can help keep your senior Newfoundland active, comfortable, and happy. Always consult your veterinarian before adding new supplements to ensure they match your dog’s specific health needs. By choosing the best senior dog supplements, you’ll support your Newfoundland’s overall well-being and give them the healthy, happy golden years they deserve.

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