AA,
the good thing is usually he'll do all his stunts once. I don't know if it's cos he really knows that it's wrong after we scolded him or he has "funnier" things to do.
And ya, Reyes, for the dog food, she was following him. It made me angry too. For the climbing, she was standing below "scolding" the brother. And it made me angrier cos even the sister knows it's wrong. Luckily by bedtime, she was pretty tired le so she ignored the brother's silly acts and tried to zzz. I would have gone mad if she follows too.