Sims 4 Room Challenge

If you do not want them to gain too much weight, only feed them when the hunger bar turns red. Once they turn red, you have several hours before they become ravenous. I usually only feed my Sims once a day or less. The Sim gets the -1 for being hungry, but usually they have enough other moodlets that they never even notice being hungry. You also save money making food, which in nice in a challenge like this one.