Continuity mistake: When the delivery man comes to the door with Porky's canary (Charlie Dog), the front door handle has a keyhole with it, but when Porky throws Charlie out of the house, there is no keyhole.
Continuity mistake: When Charlie Dog puts down his stick after revealing the word "Me" on the flip chart, the stick is initially pointing towards the chart. A few shots later, the stick is now by Charlie's foot.
Continuity mistake: When the driver of the Acme Pet Shop van goes into his vehicle, the doors on the back of the van change between shots.
