Feeding Dogs Better: Three Foundational Rules

Improving a dog’s diet does not require an immediate complete overhaul. Incremental changes can provide measurable benefits to nutrient intake, digestion, and long-term health. Whether a dog is fed a fully commercial processed diet, a mixed diet, or a completely home-prepared plan, the following three principles apply.

Rule 1: Include More Whole Foods, Reduce Processed Foods

Commercial extruded diets (kibble) and many canned foods undergo significant heat and pressure during processing, which can reduce the availability of heat-sensitive vitamins, degrade certain amino acids, and oxidise fats. Fresh whole foods contain nutrients in their natural matrix, often with co-factors that improve absorption and utilisation.

Evidence from partial diet replacement studies indicates that replacing as little as 20–25% of a processed diet with fresh whole food ingredients can improve circulating vitamin status, support microbiome diversity, and reduce markers of oxidative stress in dogs.

For those feeding a fully home-prepared diet, reliance on synthetic multivitamin powders can be reduced by incorporating whole food nutrient sources. Examples include:

• Minerals – meaty bones, shellfish, oily fish.
• Vitamins – seasonal fruits and vegetables.
• Fats & fat-soluble vitamins – seeds, oily fish, pastured dairy.

These whole food sources provide nutrients in biologically active forms, which the body can metabolise more efficiently than some synthetic counterparts.

Rule 2: Select Species-Appropriate Ingredients

Dogs are facultative carnivores with physiological adaptations for digesting animal-based proteins and fats efficiently. Diets rich in high-quality animal proteins provide complete amino acid profiles, bioavailable minerals such as zinc and iron, and essential fatty acids.

For those feeding commercial diets, selecting formulas with higher animal protein content and reduced starch, grain, and filler load is preferable.

For home-prepared or mixed diets, emphasis should be on nutrient-dense, species-appropriate foods such as:

• Lean and fatty meats from ruminants, poultry, and game.
• Fish and shellfish (low in thiaminase varieties or appropriately cooked if thiaminase content is high).
• Organ meats for concentrated micronutrient supply.

Adding leftover starches (e.g., white rice) provides limited micronutritional value compared to adding fresh meats, fish, or nutrient-rich plant matter. Only safe ingredients should be added; certain foods (macadamia nuts, grapes, onion) are toxic. Some ingredients with historical controversy, such as avocado flesh or raw organic garlic, are safe for dogs in controlled amounts when properly prepared.

Rule 3: Supplement Nutritional Gaps

Even well-formulated home-prepared diets can have micronutrient gaps if ingredient variety is limited or seasonal changes restrict availability. Processed diets can also benefit from targeted supplementation to offset losses from manufacturing and storage.

Key supplement categories include:

• Omega-3 fatty acids (EPA/DHA) – support anti-inflammatory pathways, cardiovascular health, and cognitive function.
• Probiotics and digestive enzymes – aid nutrient absorption and microbiome balance.
• Micronutrient top-ups – e.g., iodine from kelp, manganese from mussels, zinc from oysters, if not supplied by the base diet.

When feeding a home-prepared diet, a nutrient analysis should be conducted using established reference standards such as NRC (2006). Consulting a certified canine nutritionist is recommended to ensure micronutrient targets are met and to avoid excesses that can cause harm over time. This is particularly important when formulating cooked diets, as heat can reduce vitamin activity, alter amino acid availability, and impact fat stability.

Conclusion Applying these three rules—prioritising whole foods, selecting species-appropriate ingredients, and supplementing strategically—can enhance a dog’s nutritional profile regardless of the starting point. Small, consistent changes often deliver meaningful improvements in long-term health. Want some assistance? Download this free eBook .