High chair or not, its up to the training. If we are not there to control, like leaving baby with nanny, granny, etc. There's no way we can expect the kid to be able to sit kuai kuai during meal times. Seen many examples, my mil allow her first granddaughter to do whatever she want, now at 4, cant even order her to eat her meal herself, she's always playing her toys, watch TV, run around the whole place with my mil or my sil chasing with the bowl of rice. Usually take more than 30mins to eat (doesnt mean finish) the food.