What is the best dog food I can feed all my dogs? (Including a new English Mastiff Puppy!!)?

We also have a german Shepherd/lab mix who is a year and a half and a Pomeranian who is 6. Is there anything I can feed them all at this stage, or should I get something different for each one. I heard puppy chow is bad for a mastiff puppy. I'm confused, but yet at the same time we have done alot of research.