I have a 12 week old Chesapeake Bay and I was wondering what is a good dog food to start feeding him. I realize that there are numerous brands and opinions, but I wanted to ask anyways. I have started out feeding him Purina Puppy Chow but have recently switched him to Simply Nourish Chicken and Brown Rice recipe. I has been a little skeptical about the new food so I wanted to get other peoples opinions on what type of food they used. Any help is greatly appreciated.