Your puppy is about the same age as my son’s dog, Maggie. We have 3 older dogs and haven’t had any problems with feeding. Maggie is eating a different food but sometimes eats the “big dog” food. They don’t seem to mind. The only reall issue we have had is that Maggie wants to play and play and play. She has been fussed at more than once.
Good Luck,
Bobbie