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Royal Canin vs Hill's Science Diet

Two veterinary-trusted brands with different approaches—Royal Canin's breed-specific formulas vs Hill's clinical nutrition. We compare their strengths.

At a Glance

MetricRoyal CaninHill's Science Diet
Products Available200+170+
Average Rating4.69/54.65/5
Total Reviews70,000+65,000+
Parent CompanyMars, Inc.Colgate-Palmolive
Price Range$$$-$$$$$$$-$$$$
Breed-Specific Options

Royal Canin

Founded in France in 1968 by veterinarian Jean Cathary. Known for breed-specific nutrition with kibble designed for each breed's jaw shape. Extensive veterinary diet line.

Unique Approach:

  • Breed Health Nutrition - 50+ breed-specific formulas
  • Size Health Nutrition - Size-specific options
  • Veterinary Diet - Therapeutic nutrition
  • Custom Kibble - Shaped for each breed's mouth
  • Care Nutrition - Condition-specific formulas

Hill's Science Diet

Founded in 1939, Hill's pioneered clinical nutrition for pets. Known for research-backed formulas and the most extensive prescription diet line. Strong veterinary partnerships.

Unique Approach:

  • Science Diet - Everyday clinical nutrition
  • Prescription Diet - Industry-leading therapeutic line
  • Perfect Weight - Proven weight management
  • Clinically Proven - Research-backed formulas
  • 220+ Scientists - Extensive R&D team

Royal Canin Pros

  • Extensive breed-specific formulas
  • Custom kibble shapes for each breed
  • Strong veterinary presence
  • Highly palatable formulas

Royal Canin Cons

  • Contains some by-products
  • Higher price point
  • Uses some corn/wheat

Hill's Science Diet Pros

  • Most trusted prescription diet line
  • Clinically proven formulas
  • Excellent therapeutic options
  • Strong research backing

Hill's Science Diet Cons

  • No breed-specific formulas
  • Less flavor variety
  • 2019 vitamin D recall

Top Royal Canin Products

Top Hill's Science Diet Products

The Verdict

Both are vet-trusted premium brands with different specialties. Choose Royal Canin if you have a specific breed and want nutrition tailored to their unique needs—especially brachycephalic breeds or dogs with specific jaw shapes. Choose Hill's if your dog has medical conditions requiring therapeutic nutrition.

For prescription diets, both brands are excellent—Hill's has a slight edge in therapeutic variety, while Royal Canin excels in palatability and breed-specific solutions.

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