Conservation of vegetables

From George
We sometimes have problems getting Gwenchik to eat the vegetables we give her for lunch at day care. One evening at dinner, Gwenchik asked for more homemade sauerkraut.
Gwen: I like sauerkraut so much!
George: But you don't eat it when we give it to you for lunch at day care.
Gwen: That is because if I eat it during the day, then I won't have enough to eat at home.