It must have been that vicious dog he was petting that randomly licked him one day while it savagely wagged its tail. There's no other explanation for the sudden growth of fangs in his mouth or the hair growing on his body or even the extra quarter inch of growth that made his tail longer. Yes, he turned into a werewolf on the not exactly full moon but shut up on Halloween night!
Once fully transformed he ran after his mom, who just laughed a bit, then attacked and devoured her... bowl of candy.
After that massacre he chased after the other cubs in the street... even if it was just to join them in trick or treating.
RAWR! His fangs were feared by all, but mostly himself because they were really starting to ache where the plastic wasn't smoothed down enough. The wig was sliding off all the time too.
