I was trying to get the best food I could find at a Petco and not at a specialty store. I would go to a specialty store if I HAD to because of the location. Someone told me that Nutro Natural Controlled food for Large Breed puppies was a good choice. Has anyone ever tried it? My breeder was giving them Imas puppy food but I read that it had by-products and additivies. What are you guys feeding your Doodle?? Help!