Lisa is stopped from stepping on a rattlesnake egg, and it is placed back under the snake with others. In reality, rattlesnakes do not lay eggs.
When Homer and Bart arrive to go destroy the beaver dam, Homer says "Oh, boy", but his lips don't move.
Bart says that the ranch doesn't have any radio or TV, but later on Maggie is listening to Britney Spears on a radio in the ranch.