Continuity mistake: When Porky Pig arrives at the countryside, he places his easel next to a tree, but when we see a full view of Porky painting a little later on, the tree has gone.
Continuity mistake: When Annie finishes her song about "doin' what comes naturally," she grabs her rifle and uses the butt to shoo the children towards the house. The man she is talking to is close enough that she could touch him with the gun if she wanted too. The shot changes to a longer shot of the same view and the man is suddenly 5 or 6 feet further away, where the gun would no longer reach him.
Continuity mistake: When the crane is shovelling dirt into the dump truck at the beginning of the short, the crane initially dumps the dirt into the far end of the box container, but in the next shot the dirt has now moved near the truck unit.
Continuity mistake: When Tom shoots a stream of balls to flatten Jerry, the last ball in the pack is coloured purple, but when the balls rebound off the side rail, the last ball is now a green one.
Continuity mistake: When Bugs Bunny tells Yosemite Sam he is only three and a half, you can see there is dirt around the hole, but when we see Sam in the next shot, the dirt has disappeared.