Continuity: Mr. Tweedy's shotgun disappears on the porch in the opening sequence.
Continuity: Mr. Tweedy's position after being knocked out.
Continuity: Rocky abseils on a telephone wire through a round window into the shed with the pie machine. The bracket holding the wire is clearly attached exactly above the window. Later, when Mrs. Tweedy involuntarily skydives from the plane, she enters the shed through the same round window (the bracket is clearly visible above it) but she does not hit the wire on her way down.
Continuity: The chicken catapult changes during Mac's demonstration. The teeth on the cog and ratchet point in different directions within the same scene.
Continuity: The "Egg Production Table" in Mrs. Tweedy's hand changes twice.
Continuity: Babs' knitting bag disappears completely after she hides it behind her back.
Anachronisms: During the film, the main character is cycling through the English countryside listening to his little radio. On the radio is ‘The Wanderer’ by Dion. The film is set in 1959, but ‘The Wanderer’ was a UK hit in 1962.
Continuity: The tire mark on Mrs. Tweedy’s forehead disappears/reappears between shots.
Audio/visual unsynchronized: In the last few minutes of the movie, when Rocky comes back to the farm on his tricycle, he is heard yelling "Ginger," but if you took a good look at his beak when you hear him say it, you will find that the beak is not opened. It's closed.
Continuity: After Mrs Tweedy falls off the plane, the shot of Fowler saying "The old bird bought it" is flipped (the "17" is the wrong way round and is also on the wrong side of the hut door).
Continuity: In the overhead shot of the huts when Rocky starts teaching the chickens how to fly, hut 24 is behind hut 23. Later, when Nick and Fetcher are watching them jumping on the hot water bottle, huts 23 and 24 are next to each other.