The quality and appropriateness of canine nutrition directly affects dog health and welfare, with both deficiency and excess causing preventable welfare problems across the companion dog population.
Dog nutrition directly determines welfare through its effects on body condition, energy levels, disease risk, and longevity. Obesity — the most common nutritional welfare problem — causes musculoskeletal pain, respiratory compromise, exercise intolerance, increased cancer risk, and shortened lifespan. Overfeeding is often an expression of owner love that paradoxically harms the animals it is intended to benefit. Conversely, nutritional deficiency from poorly formulated homemade diets or low-quality commercial products causes developmental problems in puppies, immune compromise, and reduced quality of life. The marketing-heavy pet food industry creates significant consumer confusion that complicates informed dietary decisions. Veterinary nutritional guidance — increasingly available through board-certified veterinary nutritionists — provides the most reliable basis for welfare-conscious dietary decisions.