Continuity mistake: In the overheard view of the dog grooming the cat, you can see there is nothing beside them, but in the next shot a blue ribbon suddenly appears.
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 Bugs takes out the bubble gum, you can see he is holding the gum between two fingers and a thumb. But in a close-up, he is holding the gum at the bottom of the wrapper.
Continuity mistake: After Tom says goodbye to his friends, he goes to sleep on the window ledge. At this point, you can see it's night time, but when we see him sleeping from inside the house in the next shot, it is daylight outside.
Continuity mistake: When Tom is throwing dynamite into Jerry's mouse-hole, you can see he is surrounded by sticks of dynamite, but when Muscles marches out of the hole with the dynamite, the sticks have disappeared.
Continuity mistake: When Claude is reading the book near the book shelf, he has two fingers on the back cover. But in a close-up of the book, there are now three fingers on the back cover.
Continuity mistake: When we first see Bugs' home at the start of the cartoon, there is nothing around the hole. When the camera pans in on the hole, pieces of carrot have appeared.