Last Updated: 30/04/2026
What Should You Feed Your Large Breed Dog? A Vet’s Guide to Big Dog Nutrition
Learn what to feed large and giant breed dogs at every life stage. Vet-written guide covering growth, joint health, weight management, and nutrition tips for big dogs.
Author: Dr Olivia Clarke BSc BVMS MANZCVS (Unusual Pets, Avian)
Reading Time: 4 minutes - short read
This article is written by Pet Circle veterinarian Dr Olivia Clarke BSc BVMS MANZCVS in partnership with Hill's Pet Nutrition .
If you have a large or giant breed dog, what you feed your big dog matters more than you think. A Great Dane's nutritional needs are very different to that from a Chihuahua. That’s why Hill’s Pet Nutrition has developed a food range specifically for our gentle giants. In this vet-written article we explain exactly how Hill’s Science Diet Large Breed dog foods are designed to meet the needs of large and giant breed dogs.
Why is Feeding the Right Nutrition so Important for Large Breed Dogs?
The Big Difference
From the rapid growth of puppyhood to the joint strain of adulthood and the earlier onset of senior years, their size fundamentally impacts how we should feed them. Large breed dogs (generally expected to reach over 25 kg as adults) take a longer time growing, carry more body weight on their joints, and have different metabolic patterns compared to smaller breeds.
- Joint Load: A heavier body places significantly more mechanical stress on hips, elbows, and knees.
- Slower Metabolic Rate (per kg): Large dogs burn fewer calories per kilogram of body weight than smaller breeds, meaning they often require fewer calories than owners expect.
- Extended Growth Period: Many large breed puppies grow for 12–18 months (or up to 24 months for giant breeds), extending the window where nutrition must be carefully controlled.
Because of these differences, ensuring r large and giant breeds are fed the right nutrition from the start is key to avoiding long-term skeletal and joint problems.
The Risks of an Improper Diet
Feeding a large or giant breed the wrong nutrition, particularly during growth, especially one with excess calories or unbalanced calcium and phosphorus, can contribute to developmental orthopaedic diseases (DOD) such as hip dysplasia and elbow dysplasia.
Excess body weight significantly increases joint stress and worsens mobility issues. Overweight dogs are more likely to develop osteoarthritis, and symptoms tend to be more severe.
For large breeds, preventing excess weight is one of the most powerful tools we have to protect lifelong joint health.
How Hill’s Science Diet Supports Large Breeds
Hill’s Science Diet Large breed recipes are suitable for large and giant breeds and are carefully formulated to provide
- Balanced minerals to support healthy bones and teeth, especially important during growth and skeletal development
- High quality protein to maintain lean muscle mass
- Natural sources of glucosamine and chondroitin for joint support in large breed lifestage foods
- The right amount of calories and fat to maintain a healthy body weight
- Bigger kibble size designed for large mouths to encourage proper chewing, slow down rapid eating
When it comes to bone development, joint stress and weight management, getting nutrition right isn’t just beneficial, it’s critical.
Nutrition Through the Life Stages
Large Breed Puppies: Controlled Growth Is Key
One of the biggest misconceptions is that we want large breed puppies to grow as quickly as possible. But the opposite is actually true: slow, steady growth is ideal.
Why They Shouldn’t Grow Up Too Fast
Rapid growth increases stress on developing bones and joints. Overfeeding, even high-quality food, can push puppies to grow too quickly, increasing the risk of skeletal and joint abnormalities. Portion control and following the feeding guidelines is essential.
Precisely balanced Calcium & Phosphorus
Large breed puppies require:
- Carefully controlled calcium levels
- A precise calcium-to-phosphorus ratio
Too much calcium can interfere with normal bone remodeling and growth plate development.
Hill’s Science Diet Large Breed Puppy diets are specifically formulated to offer:
- Moderate energy density and fat levels
- Controlled mineral levels (calcium, phosphorus)
- Nutrition that supports steady growth and skeletal development
Adulthood & Weight Management
As large breed dogs enter adulthood, maintaining a lean body condition becomes essential. Because excess weight increases load on joints, which can damage the joint cartilage and promote the development of arthritis. Even a small amount of excess weight can significantly reduce mobility and quality of life. Maintaining muscle mass is especially important in large dogs, as strong muscles help stabilise and protect joints.
There are even recipes specifically designed to support weight management as well as ones that support both weight management and joint health together.
Other tips to keep your large or giant breed dog at a healthy weight include:
- Avoiding free-feeding.
- Following portion guidelines carefully.
- Monitor body condition, not just weight.
Check out our guide to body condition scoring your dog here in our vet article.
Senior Years: Supporting Ageing Joints
Large dogs are typically considered senior earlier than small breeds, in fact from as early as five years of age.
As metabolism slows and activity levels decrease, their nutritional priorities shift.
Large and Giant Senior Dogs Need:
- Reduced calorie intake to avoid weight gain
- Joint-support nutrients such as glucosamine and chondroitin
- Antioxidants to support immune health and cellular ageing
Keeping senior large breeds lean can significantly improve comfort and mobility. And Hill’s Science Diet Large Breed Senior 6+ food provides the essential nutrition they need to keep their joints mobile, muscles strong and bodies lean.
Quick Vet Tips for Feeding Your Large Dog
- Measure portions accurately: Use a proper Hill’s measuring cup or kitchen scale, avoid estimating.
- Use body condition scoring (BCS): You should be able to feel (but not see) ribs easily, with a visible waist when viewed from above.
- Transition diets slowly: When switching to a new food transition over 7–10 days by gradually increasing the new food while decreasing the old one.
- Avoid excessive treats: Keep treats under 10% of daily caloric intake.
Give Your Big Dog the Nutrition They Deserve
Large breed dogs rely on precise nutrition to support healthy growth, protect their joints, and maintain lean muscle throughout life. Give your big dog the nutrition they deserve. Shop the full range of Hill's Science Diet Large Breed formulas below.
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History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Thu Apr 30 2026
Written by Dr Olivia Clarke BSc BVMS MANZCVS (Unusual Pets, Avian)Dr Olivia Clarke BSc BVMS MANZCVS (Unusual Pets, Avian)
Veterinarian
Dr Olivia graduated from Murdoch University in 2015 and worked in Western Australia before moving to Sydney to work in specialist practice as an avian and exotics veterinarian. Olivia has thoroughly enjoyed the diversity of species and interesting cases in her time as an exotics veterinarian. She has a particular soft spot for rabbits and thoroughly enjoys all aspects of rabbit medicine and surgery. She also has many years of experience working with dogs and cats as well as an array of wildlife.
