Wouldn't touch any of the commercial dog foods as i was advised years ago by a few dog breeders and pet shop owners that they are full of colourants, preservatives amongst other additives but at the end of the day, if it works for your dog then who is anyone to tell you different
I put my GSP pup on Burns Puppy as it's totally natural and she was great on it. I would always buy the best puppy food for a pup such as Burns, Eukanuba etc as it's the most important stage of its life. Expensive but worth it imho...each to there own
Every day my Whippet gets approx;
50% raw beef or coo