Would it be possible to make it so that whenever you feed her too much too fast, she would be stuffed and have a visually stuffed belly. Then when the next day rolls around, she gains the next weight gain stage. If she barely ate however ( meaning not feeding her anything other then 1 smoothie), then she would lose 1 stage of her weight, regressing all the back to her first stage unless you feed her a set amount. This is just a thought I had, love the game as is.
P.S. SUPER HAPPY YOU'RE FIXING THE CAR COLLISIONS!!! that genuienly made me not want to play the car mini game and prayed I got the arcade one.