what is the difference beteew iams puppy and iams large breed puppy? which is better for a boxer? I have also been looking at switching to canidae but is there a big difference between QUALITY of the two brands, i know people dont like aims because of some new s that came out, but i just want to know about the quality and which is better for my puppies. I also have a new 11 week old puppy moving in and is canidae ok for that young? I need as many opinions as i can get. the new puppy is currently on iams large breed puppy formula.