Most reputable breeders do recommend food. Our breeder told us what puppy food she was using and also what she was feeding the adult dogs. She explained why she chose those foods as well. She didn't require that we feed those foods in her contract or health guarantee nor did she require Nuvet or other supplements. I think most forum members would agree that a requirement of that type with the breeder earning a commission indicates a monetary motivation and probably could be considered a red flag. Whether it's a make or break should be up to the individual. Debating whether the duration of the requirement is 2 yrs or a lifetime seems like splitting hairs to me......