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We all want as many years with our Bullmastiffs as possible. As your Bullmastiff ages, you may be looking for additional ways to support their health.

The following list of supplements is among the top recommended products for senior bullmastiffs. As always, be sure to consult your own veterinarian before making any changes to your bullmastiff’s dietary or medical regimen.

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

Joint pain and arthritis are some of the most common ailments an aging bullmastiff 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 Bullmastiff

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.

We’d recommend looking into a 3-in-1 probiotic that also contains prebiotics and digestive enzymes. 

3. Omega-3 Essential Fatty Acids to Fight Inflammation & Reduce Itchy Skin for Your Senior Bullmastiff

Older dogs may experience dry, itchy skin and dull, brittle coats. Adding Omega-3 and Omega-6 fatty acids to a senior dog’s diet can reduce inflammation and promote healthy skin and a soft, shiny coat. Omega-3 fatty acids also support healthy mobility and bone health. Additional benefits in the body include allergy support, heart health, strong brain function, and visual acuity.

Krill oil is one of the best sources of Omega-3 available, as it contains a special form of fatty acids that are more usable in your dog’s body. In addition, many high-quality krill supplements also contain a powerful compound called astaxanthin, a highly potent antioxidant.

4. Milk Thistle for Your Bullmastiff’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 bullmastiffs, 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 bullmastiffs. 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 in 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 Bullmastiff’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 Bullmastiff’s Digestive Health

Senior dogs may experience changes in the lining of the intestines, which lowers 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 Bullmastiff Aging Support

As your Bullmastiff’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 Bullmastiff parents opt to add additional protein over 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 Bullmastiff.

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 bullmastiffs 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 Bullmastiff

1. What supplements are most important for a senior Bullmastiff?

Senior Bullmastiffs benefit most from supplements that support joint health (glucosamine, chondroitin), mobility, heart function, and digestive wellness. Omega-3 fatty acids and probiotics are especially helpful in maintaining overall health.

2. Why does my senior Bullmastiff need supplements?

As Bullmastiffs age, they often face joint stiffness, slower metabolism, and reduced nutrient absorption. Supplements provide targeted support to help them stay active, comfortable, and healthy.

3. Are joint supplements necessary for older Bullmastiffs?

Yes. Large breeds like Bullmastiffs are prone to arthritis and hip dysplasia. Joint supplements with glucosamine, chondroitin, and MSM help reduce inflammation and improve mobility.

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

Omega-3 fatty acids from fish oil promote heart health, support brain function, reduce inflammation, and keep your dog’s coat shiny and skin healthy.

5. Do senior Bullmastiffs need multivitamins?

Multivitamins can be beneficial, especially if your Bullmastiff isn’t getting a complete and balanced diet. They help fill nutritional gaps and boost energy levels.

6. What role do probiotics play for senior Bullmastiffs?

Probiotics support gut health, improve digestion, and strengthen the immune system. Senior dogs often have sensitive stomachs, and probiotics can help regulate bowel movements.

7. Should I give my senior Bullmastiff supplements for heart health?

Yes. Taurine and L-carnitine are important supplements that support heart function and circulation, which is vital for large breeds prone to cardiac issues.

8. How can antioxidants help my senior Bullmastiff?

Antioxidants like vitamin C, vitamin E, and CoQ10 protect cells from damage, strengthen immunity, and slow the effects of aging on the body.

9. Are senior-specific dog supplements better than general ones?

Senior-specific supplements are designed to meet the needs of aging dogs. They usually include higher levels of joint support, heart health ingredients, and immune-boosting compounds, making them more effective for senior Bullmastiffs.

10. Can supplements improve mobility in a senior Bullmastiff?

Yes. Supplements with glucosamine, chondroitin, MSM, and green-lipped mussel can reduce stiffness, ease arthritis pain, and improve overall mobility.

11. Are there natural supplements safe for senior Bullmastiffs?

Absolutely. Natural supplements like turmeric, pumpkin, bone broth powders, and coconut oil can safely support joint health, digestion, and skin health.

12. How do I choose the best supplement brand for my Bullmastiff?

Look for supplements with high-quality, vet-approved ingredients, clear labeling, and no harmful fillers. Reputable brands should also have third-party testing for safety.

13. How long before supplements start working for senior Bullmastiffs?

It can take anywhere from 4 to 8 weeks to notice improvements in mobility, energy levels, and digestion, depending on the supplement and the dog’s health condition.

14. Can I give my senior Bullmastiff multiple supplements at once?

Yes, but consult your veterinarian first. Some supplements can overlap or interact, so it’s best to ensure your Bullmastiff gets the right balance without over-supplementing.

15. What’s the safest way to introduce supplements to a senior Bullmastiff?

Start with one supplement at a time, introduce it gradually, and monitor for any side effects. Always follow dosage instructions and seek guidance from your vet.

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.

Related: Top Pet Insurance Plans for Bullmastiffs

Choosing the Best Supplements for a Senior Bullmastiff

As Bullmastiffs 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 Bullmastiff 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 Bullmastiff’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.