Dog Nutrition Fundamentals: Science of Food Selection, Label Reading & Breed-Specific Considerations
Evidence-based guide to dog nutrition: macronutrients, how to choose quality dog food, reading ingredient labels, and nutrition considerations by life stage and breed.
Key Takeaways
Evidence-based guide to dog nutrition: macronutrients, how to choose quality dog food, reading ingredient labels, and nutrition considerations by life stage and breed.
Related Species
A dog's health is built from day-to-day nutrition. "What should I feed?" "How do I read pet food ingredient labels?" "Are there nutrients I should be careful about for this breed?"—many pet owners have questions about dog nutrition.
This article explains the fundamentals of canine nutrition in an easy-to-understand way, based on scientific evidence.
Key Nutrients Dogs Need
Protein
Although dogs are omnivorous, they have relatively high protein requirements. Protein is essential as a building block for muscles, immune systems, enzymes, and hormones.
High-quality protein sources: Chicken, beef, fish, eggs, legumes (digestibility varies)
Recommended protein content in typical dog foods: - Adult dogs: 18% or more on a dry matter basis (AAFCO standard) - Growth period, pregnancy, and nursing: 22% or more
However, more protein isn't always better—dogs with kidney disease require protein restriction.
Fats
The most energy-dense nutrient (provides about twice the calories of protein or carbohydrates). Essential fatty acids (omega-3 and omega-6) are important for skin and coat health and inflammation control.
Good sources of omega-3: Salmon, sardines, flaxseed oil, fish oil
Carbohydrates
Not an essential nutrient for dogs (like cats, dogs can survive without carbohydrates), but they function as an energy source and support intestinal health (fiber). Commercial dry foods typically contain significant amounts of grains and sweet potatoes.
About grain-free dog food: Some research has noted a potential link between grain-free foods (especially those using large amounts of legumes and potatoes) and dilated cardiomyopathy (DCM) (FDA investigation). While a definitive causal relationship remains unclear, caution is recommended for large breed dogs and breeds with high DCM risk.
Vitamins and Minerals
Calcium-to-phosphorus ratio: Critical for skeletal formation. An imbalanced ratio can result in abnormal bone development. Complete and balanced commercial foods typically have adjusted ratios.
