I used to use the expensive and overpriced "holistic" dog foods until a Schnauzer I had, got bladder stones. My vet had quite a few dogs coming in with the same issue, and she'd said what they all had in common, was the expensive foods. She said to me, "I have no problem with Purina." She went on to say that Purina has years of research into their food, whereas these other high dollar food do not, nor do they have vets as their nutritionists, like Purina does. Come to think about it, I knew two other vets that use Purina One or Purina Pro Plan. I also had an outdoor cat that lived to 20 yrs, on Purina One! So... Needless to say my dogs all eat the Purina One Healthy Weight. They look and feel great, have energy and bright eyes. Having Pancreatitis prone small dogs, this keeps their fat intake low, and they've done well. I give Purina One two thumbs up!