Each cub has 6 belly points, the more the fuller and stronger they are.

Ex: ⬛⬛⬛⬜⬜⬜

⬛= Belly point
⬜= Empty

⬛⬜⬜⬜⬜⬜= starving
⬛⬛⬜⬜⬜⬜= hungry
⬛⬛⬛⬜⬜⬜= Satisfied
⬛⬛⬛⬛⬜⬜= happy
⬛⬛⬛⬛⬛⬜= Perky
⬛⬛⬛⬛⬛⬛= Full
None= Death

Hunger points go down with every action.