I am buying a puppy who had been fed this food her whole life, but I am not a member of Costco and don’t intend to be, so is there a quality holistic food that is similar that I can use so the change isn’t too much for the dog? What if I can’t do a gradual change, as in I don’t have that the Kirkland brand available to me?

Hey everyone!
I just bought my little dog dog food from Costco for the little ones, and he loves it!Sorry I don’t know much about dog food, but my vet recommended Costco brand dog food, and it’s so cheap so it’s good so far! So your thoughts? I’ve been looking at raw food diet stuff.