Companion Dog Nutrition and Welfare

Nutrition is foundational to companion dog welfare. Poor dietary choices contribute to obesity, dental disease, nutrient deficiencies, and chronic illness — while evidence-based feeding supports long, healthy lives.

Key Facts

Approximately 56% of dogs in the United States are classified as overweight or obese — the most common preventable welfare problem
Obesity in dogs is associated with reduced lifespan, osteoarthritis, diabetes, respiratory compromise, and reduced quality of life
Dogs are omnivores with flexible dietary requirements that differ from cats in key nutritional needs
Raw meat diets carry documented risks of bacterial contamination (Salmonella, Campylobacter) for both dogs and human household members
Grain-free diets became popular without evidence base and have been linked to dilated cardiomyopathy in some breeds
Fresh water availability at all times is a fundamental nutritional welfare requirement often overlooked

Welfare Considerations

Companion dog nutrition is an area where owner choices profoundly impact welfare outcomes over many years. Obesity — the most widespread nutritional welfare problem — is driven largely by overfeeding and insufficient exercise, compounded by high-calorie commercial treats. The health consequences of obesity are severe: joint pain from osteoarthritis, reduced exercise tolerance, breathing difficulties, and significantly shortened lifespan. Nutritional welfare also encompasses the opposite problem — underfeeding or poorly balanced home-prepared diets that cause deficiencies. Evidence-based guidance from veterinary nutritionists should guide dietary choices, particularly for dogs with medical conditions. The proliferation of marketing-driven dietary trends (raw, grain-free, boutique brands) without scientific backing creates genuine welfare risks. Feeding appropriate quantities of nutritionally complete commercial food, maintaining healthy body weight, and providing dental health support through appropriate chews or brushing represents the welfare-optimizing foundation for most companion dogs.

What You Can Do

Have your veterinarian assess your dog's body condition score at every check-up and adjust feeding accordingly
Measure food portions rather than free-feeding to prevent gradual weight gain
Choose veterinary nutritionist-approved complete foods rather than following marketing trends without evidence
Limit treats to less than 10% of daily caloric intake and account for them in total food calculations
Consult a board-certified veterinary nutritionist before preparing home-cooked diets to avoid deficiencies
Ensure fresh, clean water is always available and encourage adequate hydration, especially in warm weather