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 Porky goes to bed, he turns off the light above his bed and you can see that the light cord is beside the bed, but when we see Porky going off to sleep in the next shot, the cord has disappeared.
Continuity mistake: Before Elmer Fudd does his high diving act, you can see the pot behind him has a plant in it but in the next shot the plant has disappeared.
Continuity mistake: When Elmer Fudd picks up the newspaper beside him, you can see that he is holding the paper with his hands whilst looking at the front page, but when we see the newspaper in the next shot, his hands are nowhere to be seen.
Continuity mistake: When Daffy says to Porky, "Did you lose something, Fat Stuff?" the number of trees in the background decreases between shots.