IAMS Proactive Health Adult Minichunks vs Purina ONE Chicken & Rice Dry Dog Food

Both are solid, mid-priced adult chicken-and-grain kibbles with the same 4.7 rating, so the choice comes down to kibble size, bag size and formulation. IAMS Minichunks uses small kibble suited to small dogs and picky eaters, and lists chicken and egg for muscle support. Purina ONE adds meaty morsels to the kibble, prebiotic fiber for gut health and natural glucosamine for joints, and comes in a larger bag. Owners of both report good palatability and firm stools; neither is a premium grain-free formula.

• Choose the IAMS Adult Minichunks if you have a small dog or a fast eater who gulps food, or you want a simple chicken-and-whole-grain kibble with small pieces.
• Choose the Purina ONE Chicken & Rice if you want a larger bag, a mix of crunchy kibble and tender morsels, and added glucosamine for joint support.