Continuity mistake: At the beginning of the short, we see a wrestling match on the television and underneath the screen are two knobs; the left knob is between "Light" and "Dark" and the right knob is between "Vert." and "Hor." When the cat wakes up and sees a turkey advert on the television, all the words have disappeared.
Continuity mistake: When Raymond Burr emerges from the door at the beginning of the movie, in the first shot he is in the background while Mrs. Van Gelder is dancing. Notice that the decoration to the left of the door frame casts no shadow, but in the next shot the ambient lights have changed so much that now the hanging sculpture projects a huge one. (00:02:50)
Continuity mistake: At the start of the shooting the balloons sequence, Spike is about to shoot and you can see the bottom shelf of the prize stand has two polar bears and two dolls. When Spike has finished his round, all of the prizes on the bottom shelf are polar bears.
Continuity mistake: Henry has his paisley bandana on his head when charging but loses it along the charge, but it reappears on his head during the conclusion of the battle charge. (01:08:55)
Continuity mistake: When Mr Theeves is speaking to Droopy while he is packing, there are three suitcases on the floor. In the next shot, the cases have disappeared.
Continuity mistake: When Sylvester is at the medicine cabinet, he takes out a bottle of Seasick Remedy and starts drinking it. But when we see Tweety in the cabinet in the next shot, the Seasick Remedy bottle is still on the shelf when it should be in Sylvester's hand.