Character mistake: When Mr Maddens is talking to the critic at the Mayor's reception, he calls him Alan. The character is actually called Patrick Burns, Alan is the actor's name.
Continuity mistake: After the dogcatcher, Mr. Cluge, takes Puppy Paws to the dog pound, he unfastens the dog's collar and hangs it on a peg on the wall. The next time the collar is shown, it is fastened again.