Of course after eating fleishigs, one waits six hours before one eats milchigs. The Halocho is that even if one chews food for a child, they also have to wait. The Pri Megodim writes that Lo Plug Yisroel Kedoishim Heim VeEin Lifroitz Geder, we are careful even if one is chewing not meat, but meat food, such as chicken soup or something similar, where none of the reasons would apply to wait six hours, but nevertheless the Minhag is to always wait six hours once fleishige food entered one’s mouth. The exception to that rule however is that if one just tastes the food to see if it needs salt, or puts it on their tongue to see if it is hot, or anything in which there was no chewing involved, and it is not meat proper, but just a meat dish, such as chicken soup, then one does not have to wait six hours.