WSAVA-aligned vet-channel mainstay vs the most-marketed natural brand. Purina Pro Plan runs feeding trials and employs PhD nutritionists; Blue Buffalo (now General Mills) leans on natural-positioning and LifeSource Bits marketing.
Average score: 50/100. 43 products. WSAVA-aligned. Country: US.
Average score: 48/100. 69 products. Country: US.
Overall scores are close — Purina Pro Plan averages 50/100 vs Blue Buffalo at 48/100. Purina Pro Plan is WSAVA-aligned (feeding trials, on-staff vet nutritionist, owned manufacturing); Blue Buffalo is not. Catalog breadth: Blue Buffalo (69 products) is broader than the smaller line (43).