*Topic moved to 'Help for New Tamagotchi Pet Owners'*
I suppose you can feed it snacks too - but the way I got the large family was to let the Hungry hearts drop way down to only one filled or totally empty - then to feed them the Food (not snacks) one after another after another all the way until they refused to eat any more (keep feeding until they refuse - not til the hearts are full).
Each time a Hungry heart drops feed it as many Food Meals until it refuses to eat again (not just fills the hearts you can see on screen).
I got a Large Family within one day - let all the hearts empty out and then filled them all straight away until the tama would not eat any more - and no games to exercise that weight off either