Last updated: May 2026

Royal Canin vs Hill's Science Diet: Which Is Better for Your Dog?

Two vet-recommended premium brands going head to head. Royal Canin ($14.50/kg) vs Hill's Science Diet ($13.20/kg). Both have loyal followings, both are carried by veterinarians. But one might be significantly better for your specific situation.

Quick Comparison

FactorRoyal CaninHill's Science Diet
Price per kg$14.50$13.20
Monthly cost (70lb dog)$91$83
First ingredientBrewers rice / by-product mealChicken (real meat)
Protein %25%24%
Breed-specific formulas✅ Extensiveâš ī¸ Limited
Prescription diet line✅ Yes✅ Yes (stronger)
Best forBreed-specific needsSensitive stomachs

When to Choose Royal Canin

Royal Canin wins if your dog has breed-specific health issues. Royal Canin offers targeted nutrition based on breed-specific research. This benefits German Shepherds with digestion issues, or Golden Retrievers needing joint support.

When to Choose Hill's Science Diet

Hill's wins for dogs with sensitive stomachs or food intolerances. Their prescription line (z/d, i/d, c/d) is the gold standard for digestive issues, urinary health, and kidney support. For healthy dogs, Hill's offers better first-ingredient quality at a lower price.

The Bottom Line

For most healthy dogs, Hill's Science Diet offers better value: real chicken as first ingredient at $13.20/kg vs Royal Canin's rice/by-product at $14.50/kg. Choose Royal Canin only if your dog genuinely needs breed-specific formulation or has a health condition that responds to their specific formulas.

Calculate Costs for Your Dog

See exactly what each brand would cost for your specific breed and weight.

Calculate Your Costs

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RER-Based Calorie Model AAFCO & Veterinary Guidelines

Data sourced from American Kennel Club (AKC) breed standards, ASPCA pet nutrition guidelines, AAFCO nutritional requirements, and American Veterinary Medical Association (AVMA) nutritional guidelines. Our calculator uses the veterinary-standard Resting Energy Requirement (RER) formula. Last reviewed May 2026.

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