What's The Best Dog Food Brand For My Puppy?

She'll be Seven Weeks old when we pick her up, but we aren't sure what brand to feed her. Our adult female Great Dane it's Blue Buffalo Large Breed Adult, but we don't want to feed Nukka that since hse is still a puppy. Should we jsut feed ehr Blue Buffalo Large Breed Puppy? I also heard Solid Gold is a good brand.. She's a large mixed breed if it helps (Great Dane, Akita, Bullmastiff).