When bringing a new baby home it is best to keep the puppy on what the breeder was feeding them to avoid any stomach issues. The puppy is going through many many new adjustments, momma and litter mates are gone, new human, new home, new schedule, new smells, sounds, sights, kinda overwhelming for a wee lil bit baby, don't add to it by changing the food. Wait a few months until the puppy has fully adjusted to it's new life if you want to change food.
You really should ask the breeder the question you are asking this forum, only the breeder can answer the "why". And, grain free food is no longer advised to feed, some grain free foods have been causing serious health issues like heart attacks. There is nothing wrong with grains in food.
I do not have a baby, my boy is older but we do have a few members that just got puppies, hopefully they will chime in with what they are feeding them.
__________________ Joan, mom to Cody  RIP Matese  Schnae  Kajon Kia  forever in my  A House Is Not A Home Without A Dog |