Continuity mistake: When Hubie and Bertie hit Claude's feet with a hammer, Claude eats them up. When Claude believes he is doing something wrong, he spits the mice out but the hammer is nowhere to be seen.
Continuity mistake: When Elmer realises there are no more bullets in his gun, you can see there is a tree behind Bugs. But when we see Bugs in the next shot, the tree has disappeared.
Continuity mistake: When the young man says "What's cooking?" to St. Peter at the beginning of the short, St. Peter is holding a feather in his right hand. In the next shot, the feather has disappeared.