Switching Puppy Foods with simular product, same brand?

Most Purina food is junk. Any dog food that has corn in it is junk. Corn is a filler, hard to digest and should not be in puppy food. Corn can cause skin problems and dogs fed kibble with corn produce more poop. Do yourself and your dog a favor and switch to something without corn. Make the change gradually by mixing the old with the new until you are 100% on the new stuff. Look for something with lamb and rice or a wheat based product.