I would keep this baby on what it is on until it gets settled into the new home....at least 3 weeks. Like Ann has said, I would then transition to another food....I do not like giving raw meat to puppies, as I did that once and almost killed a litter when they did not have enough intestinal flora to digest the raw meat and they got VERY ill....never did that again. I think if you want to feed raw food, you would do best to wait until that baby is at least 8 months old, and can appropriately digest a raw diet....   
With a baby that is too young to be separated from momma.....I would strongly recommend Royal Canin canned puppy mousse. I would feed that until baby is at LEAST 4 months old, then switch to Royal Canin Puppy kibble, which is still a puppy formula that they must have to develop to their best ability, then at a year old they can go to adult kibble.     |