Adopted a 4mo lab mix from a rescue over the weekend. Great dog so far and he seems very healthy. Question is that he obviously didn't have the best start in life so I want to ensure I'm meeting all his dietary needs. He came with a bag of puppy chow and just looking at the ingredients I think I'd like to transition him on something better. What's your recommendation? Had to put our old dog of 16,5 years down about a week ago and he was eating Simply Nourish from Petsmart, but they didn't have any of that for puppies when I checked last night. Just looking to get him a more premium high quality food.