Empty bowls are clearly losers. So, I say, we do each other's chores for the day, or maid or butler. Whatever you wanna call it.
Bowls with the little prizes are like second place. So, second place gets out of a day of chores, but still hasta make a meal or something for the winner.
And obviously, the goldfish is the prize, and well, the winner gets the treats, so to speak.