It's decided! All day today, no matter what mom and dad say, I'm doing whatever I want and nothong else!

Little Wolf thinks only of himself. He never listens to his parents! Mom and Dad are tired of all his mischief and clowning around. He's really getting their goat!
Archambault plays with the French expression rendre chèvre–literally, "to turn into a goat," and figuratively, that Little Wolf is driving his parents crazy with his behavior!