Well, to get my foot in the door on this...I totally disagree about Science Diet. I have studied dozens of foods for my profession and have found SD to be good in comparable ways. My Lab eats Science Diet - that is the absolute only food she can tolerate. (no Wynsong, no Natural Balance, no NOTHING) Otherwise she pukes everywhere and has diarrhea for days. And, yes, I am more than well aware of the process of changing food. My Newf is on ProPlan Large Breed Puppy and she is doing great.

Honestly, you need to not worry about so about the lable, it is more important how your dog can handle the food, how their joints are progressing, and how they are physically handling the food.