WSAVA's Global Nutrition Committee has published guidelines for evaluating pet food brands. Key criteria: employs a board-certified veterinary nutritionist (or PhD in animal nutrition), owns its manufacturing facilities, conducts AAFCO feeding trials, publishes detailed nutrient profiles, and responds to professional questions about formulation. Brands meeting all WSAVA criteria are a small set: Hill's, Purina Pro Plan, Royal Canin, Eukanuba, Iams. WSAVA-aligned doesn't mean highest-scoring on KibbleWatcher, but it's a meaningful manufacturing-quality signal.