I'm not sure I understand what you mean, but I think you mean that you are only giving it to them this once? It won't cause any helath problems if it isn't use for any prolonged amount of time.

Generally I don't believe in giving puppy food, even to some puppies. Too many calories; makes them grow too fast and makes their bones out of whack. That's mainly just larger dogs though, like GSD's that are large and have alot of bone/joint problems.