The 15 Best Dog Foods with Glucosamine and Chondroitin

By Kevin Myers | 2021 Update

There’s an energetic spirit in every dog that wants to spend hours playing and running around.

Unfortunately, many of them cannot live this dream because of painful joint problems.

To help your dog truly live their best life, you need to feed them a diet that’s nourishing for their joints and bones. And the answer to that is glucosamine and chondroitin.

In the list below, you can find the best dog foods with glucosamine and chondroitin, along with a detailed buyer’s guide on how to choose one.

So, if you’re ready, let’s dive into it!

The 8 Best Dog Foods with Glucosamine and Chondroitin

Top ProductsRatingTop Ingredients
1. Blue Buffalo Life Protection Adult Dog Food4.6Deboned Chicken, Brown Rice, Oatmeal
2. VICTOR Purpose Performance Dog Food4.6Beef Meal, Grain Sorghum, Whole Grain Millet
3. Hill’s Science Diet Healthy Mobility Dog Food4.6Chicken Meal, Brewers Rice, Brown Rice
4. Dogswell Happy Hips Chicken & Oats Dog Food4.1Chicken, Oats, Barley
5. Wellness Complete Health Senior Dog Food4.5Deboned Chicken, Oatmeal, Ground Barley
6. Diamond Naturals Senior Formula Dog Food4.4Chicken, Whole Grain Brown Rice, Ground White Rice
7. American Journey Active Life Formula Dog Food4.7Deboned Salmon, Brown Rice, Peas
8. Purina ONE SmartBlend Joint Health Formula Adult Dry Dog Food4.6Chicken, Rice Flour, Whole Grain Wheat

1. Blue Buffalo Life Protection Formula Large Breed Adult Chicken & Brown Rice Recipe Dry Dog Food

Top 5 Ingredients: 1. Deboned Chicken, 2. Brown Rice, 3. Oatmeal, 4. Flaxseed, 5. Chicken Fat

Blue Buffalo Life Protection Dog Food is an all-in-one solution for your dog’s holistic nutrition and joint problems. It’s specially made for large and giant breed dogs with a range of premium-grade ingredients. This includes real deboned chicken, brown rice, oatmeal, and numerous fruits and vegetables. 

Besides that, the formula features glucosamine and chondroitin supplements to alleviate joint pain and improve your dog’s mobility. Obesity also puts stress on the joints, which the food prevents by burning excess fat with L-carnitine. It’s also enriched with calcium and phosphorus, which ensures the proper development of bones and stops joint problems in their tracks.


2. VICTOR Purpose Performance Formula Dry Dog Food

Top 5 Ingredients: 1. Beef Meal, 2. Grain Sorghum, 3. Whole Grain Millet, 4. Chicken Fat, 5. Chicken Meal

Victor Purpose Performance Dog Food is an excellent choice for working dogs that are at a higher risk of joint wear and tear. The high-protein formula is designed to promote muscle growth and repair while powering your dog with gluten-free whole grains. It also features a blend of probiotics, yeast, and minerals that improve digestive and immune health.

To reduce cartilage damage and ensure full mobility throughout your dog’s life, the food is enriched with both chondroitin and glucosamine. It also contains essential vitamins, minerals, and antioxidants that further improve bone health and overall wellness. The formula is perfect for breeds of all sizes but would be most beneficial when fed during adulthood.


3. Hill’s Science Diet Adult Healthy Mobility Large Breed Chicken Meal, Brown Rice & Barley Recipe Dry Dog Food

Top 5 Ingredients: 1. Chicken Meal, 2. Brewers Rice, 3. Brown Rice, 4. Dried Beet Pulp, 5. Chicken Fat

Hill’s Science Diet Adult Healthy Mobility Dog Food is formulated for breeds that are inherently prone to severe joint and hip problems. That’s why it’s designed with calculated mineral levels to promote healthy bone development right from the beginning. These minerals, along with glucosamine and chondroitin, play a major role in preventing arthritis and joint disorders that could appear later in life.

Otherwise, the formula is fully balanced and is perfect for active dogs. It’s made from high-quality chicken meal and brown rice, both of which help your dog maintain weight and stay energetic. It’s also enriched with omega fatty acids that improve your dog’s coat quality and make them appear healthier.


4. Dogswell Happy Hips Chicken & Oats Recipe Dry Dog Food

Top 5 Ingredients: 1. Chicken, 2. Oats, 3. Barley, 4. Chicken Fat, 5. Flaxseed

Although Dogswell is a relatively unknown brand, their Happy Hips Food is one of the best joint-care formulas on the market. It’s packed with human-grade ingredients like chicken breast, oats, brown rice, and barley. These ingredients play a vital part in nourishing your dog’s muscles while fueling them with loads of energy and digestive fibers.

Since the food is also designed for joint health, it’s enriched with glucosamine and chondroitin. Both of these supplements help in repairing cartilages and slowing down the degeneration of different joints. The food also consists of vitamins that strengthen immune defenses and fibers from fruits and veggies. It’s free from corn, wheat, soy, and artificial additives to prevent allergies.


5. Wellness Complete Health Senior Deboned Chicken & Barley Recipe Dry Dog Food

Top 5 Ingredients: 1. Deboned Chicken, 2. Oatmeal, 3. Ground Barley, 4. Rice, 5. Chicken Fat

Most dogs develop mobility issues in their senior life stage. To counter them, Wellness has formulated the Complete Health Senior Dog Food with added glucosamine and chondroitin. It’s primarily made with ingredients that are nutritious and easily digestible at the same time, such as deboned chicken, oatmeal, and brown rice.

More than that, the recipe features a decent amount of micronutrients for overall well-being. This includes omega fatty acids, vitamins, taurine, probiotics, and glucosamine to promote constant cartilage repair. Zero fillers, by-products, and artificial preservatives are used in the food to avoid irritating the weak digestive system of older dogs.


6. Diamond Naturals Senior Formula Dry Dog Food

Top 5 Ingredients: 1. Chicken, 2. Whole Grain Brown Rice, 3. Ground White Rice, 4. Egg, 5. Dried Beet Pulp 

Giving your dog a high-quality diet with glucosamine and chondroitin doesn’t have to be expensive. Diamond Natural Senior Formula has everything your dog needs to maintain a healthy weight, stay energetic, and have excellent joint health. It features whole foods like chicken meat, brown rice, and various fruits and vegetables to support muscles and energy needs.

In addition to this, the recipe features guaranteed glucosamine and chondroitin levels that actively repair and produce cartilage. Omega-3 and omega-6 fatty acids are also included to reduce inflammation from hip dysplasia and allergies. The formula is fortified with probiotics so your dog can properly absorb nutrients from their meals. And despite costing less, it’s free from unnecessary ingredients like fillers, corn, wheat, and artificial preservatives.


7. American Journey Active Life Formula Large Breed Salmon, Brown Rice & Vegetables Recipe Dry Dog Food

Top 5 Ingredients: 1. Deboned Salmon, 2. Brown Rice, 3. Peas, 4. Natural Flavor, 5. Barley

Large breed working dogs are most vulnerable to cartilage issues due to the enormous stress their joints experience. For such canines, American Journey’s Active Life Formula is an excellent pick. It’s formulated with deboned salmon and easily digestible carbs to encourage lean muscle growth and fuel your dog’s energy reserves all day long. 

Moreover, the food protects active canines against joint disorders with glucosamine and chondroitin. It’s also enriched with antioxidants that build up immunity and minerals to support your dog’s bones and teeth. Most of these micronutrients and macros are sourced from fibrous grains, fruits, and vegetables to increase digestibility.


8. Purina ONE SmartBlend Joint Health Formula Adult Dry Dog Food

Top 5 Ingredients: 1. Chicken, 2. Rice Flour, 3. Whole Grain Wheat, 4. Beef Fat, 5. Oat Meal

Purina One SmartBlend formulas are known for their high nutritional value and use of wholesome ingredients. This joint health dog food is specifically made for dogs prone to hip dysplasia and other joint disorders. The main ingredient of the recipe is fish oil, which naturally contains glucosamine and supports cartilage production.

Apart from fish oil, it also consists of real chicken meat so your dog can grow strong muscles. It’s loaded with antioxidants and vitamins for good immune and vision health, as well as omega fatty acids that make your dog’s coat softer and shinier. The food offers 100% balanced nutrition and is manufactured by Purina’s own quality-controlled facilities to ensure high-quality nourishment.


9. Nulo Freestyle Senior Grain-Free Trout & Sweet Potato Recipe Dry Dog Food

Top 5 Ingredients: 1. Deboned Trout, 2. Salmon Meal, 3. Yellow Peas, 4. Sweet Potato, 5. Lentils

Nulo Freestyle Senior Dog Food is not only beneficial for bone and joint health, but it’s also perfect for dogs with sensitivities and allergies. The two main ingredients in the food are trout and sweet potatoes. Both of them are non-allergenic, easy to digest, and packed with protein and carbs.

The formula is also fortified with glucosamine and chondroitin to assist cartilage repair and improve mobility in older dogs. It’s also beneficial for their bone health as it contains calcium and phosphorus. Moreover, the recipe is enriched with L-carnitine, which is an amino acid that burns excess fat and reduces the load on your dog’s joints. 


10. Ziwi Peak Chicken Grain-Free Air-Dried Dog Food

Top 5 Ingredients: 1. Chicken, 2. Chicken Liver, 3. Chicken Heart, 4. New Zealand Green Mussel, 5. Dried Kelp

If you’re a raw diet advocate but can’t find a formula with glucosamine and chondroitin, look no further than Ziwi Peak’s Chicken Air-Dried Dog Food. This New Zealand-based formula is made by a unique air-drying process that locks in the nutrients of raw food without reducing its shelf life. It features some of the best ingredients you can find in a dog food, such as free-range chicken meat, various chicken organs, minerals, and green mussel. 

New Zealand green mussel is a natural source of glucosamine and chondroitin. It digests quickly and plays a crucial role in maintaining your dog’s cartilages and mobility. Since this formula is made with limited and primarily animal ingredients, it has a digestibility rate of 95% and is perfect for sensitive dogs.


11. Nutro Natural Choice Senior Chicken & Brown Rice Recipe Dry Dog Food

Top 5 Ingredients: 1. Chicken, 2. Chicken Meal, 3. Whole Grain Barley, 4. Split Peas, 5. Whole Grain Brown Rice

Nutro Natural Choice Senior Dog Food proves that a recipe can be packed with nutrition and flavor at the same time. It’s specially formulated for senior dogs with natural ingredients and a range of micronutrients. Chicken is used as the main source of protein, while whole grains, fruits, and vegetables are added because they’re rich in carbs, vitamins, and antioxidants.

Additionally, the formula is enriched with glucosamine and chondroitin for cartilage maintenance. Healthy bones are vital for mobility, which is why the food also contains balanced calcium and phosphorus levels. It’s also free from corn, wheat, soy, and other ingredients that might disrupt digestion in senior dogs.


12. Merrick Backcountry Freeze-Dried Raw Grain-Free Great Plains Red Recipe Big Game Recipe with Beef, Lamb & Rabbit Dry Dog Food

Top 5 Ingredients: 1. Deboned Beef, 2. Sweet Potatoes, 3. Peas, 4. Pork Fat, 5. Lamb

With high levels of protein and raw-infused kibbles, Merrick’s Backcountry Great Plains Dog Food is a perfect choice for muscular hunting dogs with joint issues. The recipe has a minimum protein content of 38%, consisting mostly of beef, lamb, and rabbit meat. It also features freeze-dried raw bites that provide an extra protein boost, as well as highly digestible carbs like sweet potatoes to fuel your dog’s activities.

Since working dogs are prone to hip and joint problems, the formula is infused with glucosamine and chondroitin that build and heal cartilages. The food is also beneficial for your dog’s coat and skin health as it’s enriched with omega fatty acids. Canines with sensitivities or allergies can also comfortably eat this food because it’s free from grains, gluten, corn, wheat, and soy.


13. Purina Pro Plan Adult Large Breed Chicken & Rice Formula Dry Dog Food

Top 5 Ingredients: 1. Chicken, 2. Rice, 3. Whole Grain Corn, 4. Barley, 5. Fish Oil

Purina Pro Plan Adult Large Breed Formula is tailor-made to provide dogs over 50 pounds with a holistic diet. And since most giant dogs suffer from joint and hip problems, the formula is also enriched with glucosamine, EPA, and omega-3 fatty acids. These supplements help in producing cartilage, reducing inflammation, and improving your dog’s mobility.

Besides that, the diet is rich in protein and encourages lean muscle growth while preventing obesity. It also contains calculated fat levels for high energy levels and healthier fur. Live probiotics in the food improve nutrient absorption, while prebiotic fibers improve gut health. Lastly, the food is packed with flavor and will appeal to picky eaters.


14. Royal Canin Large Joint Care Dry Dog Food

Top 5 Ingredients: 1. Corn, 2. Wheat, 3. Chicken Fat, 4. Dried Plain Beet Pulp, 5. Fish Oil

This Royal Canin Dog Food is all about increasing mobility and supporting the joint health of large and giant breeds. It’s specifically formulated with reduced calories so your dog can maintain a healthy weight. This ensures that their joints don’t wear down due to excessive pressure, and they remain active. Moreover, the formula features collagen, which increases bone strength and reduces the risk of arthritis.

However, it’s worth noting that the recipe isn’t made of the best ingredients. Corn, wheat, and chicken by-products aren’t an ideal choice compared to real meat and grains like brown rice. Despite that, the food is popular amongst dog owners, and the brand is well-reputed for their consistency in quality. 


15. Instinct Raw Boost Senior Grain-Free Recipe with Real Chicken & Freeze-Dried Raw Pieces Dry Dog Food

Top 5 Ingredients: 1. Chicken Meal, 2. Tapioca, 3. Chickpeas, 4. Egg Product, 5. Freeze Dried Chicken

Instinct’s Raw Boost Senior Formula is a complete package that ensures balanced nutrition and is great for dogs with predisposed joint disorders. It offers loads of protein through real chicken meat so your dog can maintain a lean physique. Minerals like calcium and phosphorus help build strong bones, while DHA nourishes the brain and improves vision health.

Because joint disorders usually become prevalent in older age, the food contains glucosamine and chondroitin to promote cartilage health. It also features L-carnitine to help senior dogs shed extra weight and put less pressure on their joints. Each ingredient in the recipe is of the highest quality, so you can be sure that your dog is getting a wholesome diet.


Related:

Buyer’s Guide

Picking a great dog food is not only crucial for your dog’s joint health but also their general wellness. Here’s everything you need to know in order to select the best formula for your dog and their individual needs:

Why do dogs need glucosamine and chondroitin?

To understand why glucosamine and chondroitin are vital for mobility, we need to recognize what they are and how they’re important for cartilage. At every joint in your dog’s body, there is a connective tissue between the bones called cartilage. This tissue allows the joint to move around freely and acts as a shock absorber for the bones.

When this tissue starts thinning due to old age or disabilities, the bones start grinding against each other and wear down. This disease is known as osteoarthritis, and it can be extremely painful for dogs. It also impacts mobility and can lead to symptoms like:

  • Lameness/stiffness in legs
  • Difficulty in walking, running, and jumping
  • Weight gain
  • Reduced energy levels
  • Limping and mood changes

These symptoms can significantly lower your dog’s quality of life and make them less enthusiastic in everyday activities. The lack of exercise will inevitably lead to weight gain, and this extra weight will only worsen their arthritis. What’s even more worrying is that this disease creeps up slowly and doesn’t become prominent until it’s too late.

But if you supplement your dog’s diet with glucosamine and chondroitin at the right time, most of these problems can be avoided. To learn how, keep on reading below:

What are glucosamine and chondroitin?

Glucosamine is an amino sugar that builds cartilage and is naturally produced by the body. It is also available in the form of supplements and is usually prescribed to older dogs with joint problems. Giving your dog supplements counteracts the slowed glucosamine production of the body and helps maintain cartilage health. 

Chondroitin is another amino sugar that assists in cartilage repair, but its main role is to slow down further deterioration. See, when a dog’s cartilage gets damaged, the body produces certain enzymes to reduce swelling and inflammation. What these enzymes also do is eat away the existing cartilage, which further accelerates arthritis.  

The task of chondroitin is to shield the joint against these enzymes and promote cartilage production side-by-side. It also functions as a pain killer and is effective even against advanced arthritis. 

How many joint supplements do dogs need?

While every owner should use some form of joint supplements, the dosage can vary greatly from one dog to another. According to most experts, the average healthy adult dog should get around 15–25 mg of glucosamine per pound of body weight. As for chondroitin, dogs weighing less than 80 pounds should get around 900mg of the supplement, while those weighing more than 80 pounds should get almost 1800mg.

It’s worth mentioning that these are rough figures, and you should never give your dog supplements without first consulting your vet. A veterinarian will conduct a full assessment of your dog’s overall health, take some blood samples, and do a couple of x-rays to identify the condition of their joints. Whatever dosage they recommend is the one you should follow.

Regardless of that, there are certain factors that influence a dog’s supplement needs which every owner should know about. They are as follows:

1. Breed size

Joint and bone disorders are most common in large and giant breeds. Great Danes, Labradors, Mastiffs, German Shepherds, and Saint Bernards are all dogs that experience mobility issues due to their massive frame and heavy weight.

Since most of these breeds are genetically prone to joint diseases, it’s essential to put them on glucosamine and chondroitin supplements from a young age. Giving them a nutritious diet with minerals will also ensure proper development of the joint bones and stop arthritis in its tracks. 

2. Existing diseases or illnesses

Even though glucosamine and chondroitin are generally harmless, they’re not suitable for every dog. In large quantities, these compounds can affect the blood’s ability to clot and cause sugar spikes. 

These properties can make them dangerous for dogs with existing blood diseases like Hemophilia A and von Willebrand’s Disease (vBD). Dobermans are particularly at a higher risk of vWD and should always be fed calculated quantities of glucosamine.

Diabetic dogs should also consume precise amounts of these supplements to avoid blood sugar spikes. Owners of Miniature Schnauzers, Chow Chows, Poodles, and Beagles should take special care as their dogs are at a higher risk of becoming diabetic.

3. Age

A dog’s age can greatly impact how much glucosamine and chondroitin they need. Puppies are always at the top of the priority list as their cartilages, bones, and joints are still in the development phase. If these can grow properly without any complications, you could save a lot of money and effort you’d otherwise have to put in if your pup developed joint problems early on.

On the other hand, adults and seniors should get similar quantities of glucosamine and chondroitin. That’s because their growth stage is over, and the supplements are only given to maintain their current joint health. 

Other ways to support your dog’s joint health

Feeding a diet with glucosamine and chondroitin can improve joint health, but it’s not the only strategy you should use. Here are other steps you can implement to support your dog’s joints even further and make a more significant impact on their mobility:

1. Feed them calcium and phosphorus supplements

Taking care of your dog’s bone health early on can greatly lower their chances of developing joint defects. That’s because properly developed joint sockets and ball joints are much less likely to pop out of their position or grind against the cartilage. 

The two minerals that act as fuel for bone growth are calcium and phosphorus. They form almost 80 to 90% of the bones’ mass, and being deficient in them will likely result in defective growth. 

Ideally, you should start using these minerals during puppyhood as bones grow quickest during the first 12 months of your dog’s life. But even if you have an adult or senior canine, you should not refrain from feeding them calcium and phosphorus as these minerals can slow down bone erosion and strengthen joints.

2. Maintain a healthy weight

It might come as a surprise, but obesity is a major cause of early joint and hip problems in dogs. When their bones and joints have to carry more load than they can bear, your dog’s cartilage and bones will start wearing down more rapidly. It will also increase their risk of hip dysplasia, which can be an extremely painful experience.

What’s even worse is that obesity makes your dog lazier and less energetic. As a result, they will gain even more weight and be at a higher risk of other health complications such as heart diseases and diabetes. 

To end this cycle, you have to stick with their maintenance calorie level and cut down treats. Formulas with L-carnitine and high levels of protein also encourage fat loss while promoting muscle growth.

3. Take them for regular vet checkups

Staying in touch with your dog’s health status can make it easier to diagnose and treat joint problems. For that, you need to take them to your vet for regular checkups. A vet will identify if your dog is having mobility issues or joint problems before they worsen. 

They will also advise you correctly on which diet and supplements would be best for your dog. If you provide treatment at the proper time, your dog will heal much faster and be able to maintain their joint health well into senior years.

Best sources of glucosamine and chondroitin

Both glucosamine and chondroitin are naturally occurring amino sugars that exist in a variety of ingredients. Most of them are animal-based, which is why they’re easy to digest and get absorbed quickly.

Glucosamine is usually sourced from the shells of crustaceans such as crabs, shellfish, and lobsters. On the other hand, chondroitin is derived from animal portions rich in cartilage, such as pork tails, beef trachea, pig ears, and chicken feet. These portions also contain some quantity of glucosamine.

Factors to consider when buying dog food

Choosing a dog food that has a decent amount of glucosamine and chondroitin isn’t your only goal. You need a formula that also offers balanced nutrition and is made with good-quality ingredients. Here are a few crucial factors that can help you pick the best dog food for your specific pooch:

1. Premium-grade proteins

Protein is the foundation of a canine’s diet and serves as the building block for muscle tissue, hair, nails, and cartilage. A high-protein diet is ideal for dogs with joint disorders as it promotes muscle growth and reduces the burden on their joints. More protein also helps your dog stay lean and minimizes cartilage wear caused by excess weight. 

Real meat is the best source of protein for dogs as it contains all 12 essential amino acids plus loads of minerals. It’s also easiest to digest compared to other protein sources, such as vegetable protein and by-products. Each brand sources meat from a different animal, but the best ones are chicken, turkey, beef, lamb, and salmon. 

2. Omega-3 fatty acids

Research has proven that omega-3 fatty acids can minimize the effects of arthritis and joint damage. They have natural anti-inflammatory properties that alleviate swelling and pain caused by cartilage wear down. 

Additionally, omega-3 is an excellent supplement for dogs that suffer from allergies. It has DHA and EPA fatty acids that lower the release of histamine and prevent symptoms like itching and scratching.

3. Breed size and life stage

Dog foods are designed either for specific sizes and age groups or all of them. And they aren’t grouped randomly; the nutritional needs of dogs actually vary a great deal depending upon their breed size and life stage.

Kibbles also differ in size depending on which breed the food is designed for. Choosing a food according to your dog’s size will help them pick, chew, and swallow their food much easier.

There’s also a difference in nutritional value and calories between dog foods made for puppies, adults, and seniors. Selecting one that’s appropriate for their age will keep them fully nourished and satisfied at each life stage.

4. Allergies or health complications

Many dogs are allergic or sensitive to certain ingredients that can disrupt digestion and impact their health if consumed. These ingredients can trigger symptoms like itching, scratching, wheezing, and cause diarrhea and vomiting. 

Besides that, you should also consult your veterinarian if your dog suffers from any major health issue. Make sure that you’ve ruled out any heart complications, diabetes, or other major diseases before selecting a dog food.


FAQ’s

Which glucosamine supplement is best for dogs?

Glucosamine sulfate is the best joint supplement for dogs as its highly effective at cartilage repair. It’s also the most common type of glucosamine used in dog foods and is relatively safe for dogs that suffer from side complications.

Can dogs overdose on glucosamine or chondroitin?

Overdosing on glucosamine and chondroitin is possible, but it’s unlikely to be lethal or cause serious health issues. At best, your dog will develop diarrhea, loose stools, and vomiting so their body can flush out the excess nutrients in their body.

Which breeds are most susceptible to joint issues?

Large and giant breeds like Labradors Retrievers, Great Danes, Newfoundlands, German Shepherds, Old English Sheep Dogs, Mastiffs, and Saint Bernards are most susceptible to joint issues. Breeds with irregular frames like Daschunds are also likely to develop hip and joint problems.

What is canine hip dysplasia?

Hip dysplasia is a condition where the ball joint and socket connecting the leg to the hip don’t develop properly. This can cause the ball joint to grind against the socket or pop out of it completely. It’s an extremely painful condition with no cure but can be controlled with weight loss, joint supplements, and medication.

Should you walk dogs with arthritis?

Yes, walking dogs with arthritis can help them lose weight and slow the wear down of their joints. We recommend taking multiple short walks as they’re less painful for your dog than a long one.

Can dog food fulfill glucosamine and chondroitin needs alone?

As per recent research, most dog foods do not contain enough glucosamine and chondroitin to meet your dog’s requirements fully. That’s why we recommend adding supplements to your dog’s diet along with choosing a formula rich in these compounds.

How long do joint supplements take to show results?

Depending on how deficient your dog is in glucosamine and chondroitin, it can take between 4 to 7 weeks to see any positive change in their mobility and joint health. Even if the results aren’t visible, these supplements will maintain their cartilage and prevent their joints from deteriorating any further.

When should you start feeding your dog joint supplements?

While there’s no right time to put your dog on joint supplements, starting earlier is always a better option. According to most experts, the best time to include glucosamine and chondroitin in your dog’s diet is between the age of 4 to 6 for the average dog. If you have a larger breed with hunting genes, you should ideally start feeding these supplements from 1 to 3 years of age.