There are only two types of dog food: crap ones (lots of fillers including ingredient splitting, non-animal proteins) and good ones (protein from animal sources, chelated vitamins/minerals, natural preservatives). There are no "super good" ones, everything after the good level is just VC/PE-driven marketing and fear-based, guilt-provoking spin. Often on these supposed super premium or niche brands you'll see claims that a veterinarian helped develop the food - which is BS, as no veterinary program in North America teaches nutrition beyond what Nestle (Purina), Mars (Royal Canin) or Colgate (Science Diet) tells them - and that's focused on the business of selling food. Pet food development is the realm of
animal science and nutrition specialists, not vets. Imagine asking your family doctor to help you make a salad dressing.