Anyone feeding Professional Large Breed Puppy Chicken and Barley Formula Dry Dog Food. The owner of the pet store I was at today recommended that I try using this food and gave me some samples to try. He said that his boxers ate it and did great on it. I have been feeding Purina puppy chow large breed that the breeder was feeding and was thinking about switching. Do you think this is a good food? Thanks for the help.