Continuity mistake: When Daffy says to Porky, "Did you lose something, Fat Stuff?" the number of trees in the background decreases between shots.
Continuity mistake: When Granny is speaking to Sylvester at the start of the cartoon, you can see there is nothing is under Sylvester. In the next shot, a green pillow appears, and in the shot after that, it has disappeared.
Continuity mistake: When Daffy flies into the squadron headquarters, you can see that the strap on the left-hand side of his helmet is resting on his arm, but in the next shot the strap is directly behind him.