He should be fine with the hamster food, but if he's not eating much or he's not managing the food well then you could try porridge, cooked vegetables such as carrot or baby food (check the ingredients first), even just adding a little water to his regular food to soften the biscuit/pellet pieces a little and make them easier to manage with his tiny baby mouth. Extra protein like small pieces of chicken, egg, or mealworms will help him grow too
Good luck with Little Bear, I'm sure he'll grow up to be a very handsome hammie
