[Help] Dog food

The more I research dog food, the more convoluted it all gets. What makes a quality dog food? Is there a certain minimum % of the macros to look for? ETCI'm too skeptical to believe that "grain-free" and "all-natural" foods are actually that so we can eliminate those almost immediately unless the success with a certain brand requires notification.My dog has been eating brown rice and chicken blue buffalo large breed puppy food. He's coming up on a year and I feel like sometimes it may not sit with his stomach correctly or that it's just a low-quality food to begin with.Is there a food that's a step or two up from Blue buffalo that I could slowly switch to once he's a year?Thanks for any help! via /r/dogs http://ift.tt/2sci5kN