I put this on the "violent" shelf only because of the ending, which some kids might not like, depending on their sensitivity level. Also, the illustrations and story are presented in a silent movie type format, which I don't think most kids will get or appreciate. 
 Still, those things did not detract from my enjoyment. I am a fan of Willems artwork and his storytelling. This one reminded me of something else. Maybe Little Red Riding Hood, maybe The Little Red Hen...it all felt very familiar, albeit with a new format.