1. Don't be greedy, and selfish. It can backfire.
2. Mr.Dog asked for some pizza, and Mr.Pig declined, even though he was already stuffed. Mr.Pig had to pay the consequences of being greedy and not sharing the pizza with Mr.Dog. Mr.Pig was weighed down by all the food he ate, because he didn't share with Mr.Dog. Mr.Dog and Mr.Pig switched situations when Mr.Pig got caught by the hunter. Mr.Dog now has food for himself.