Continuity: The sheep thieves drop their ramp when they leave, but when Hoggett arrives it has gone.
Continuity: Babe's feet are muddy when he runs over to the wagon, but clean soon after.
Continuity: The fax machine Hoggett receives as a gift is different from the one he uses to send his application for the show.
Revealing mistakes: Straps holding sheep in neat formation visible.
Continuity: At the beginning of Babe's competition, Farmer Hogget removes the leash which then reappears and disappears in subsequent shots.
Incorrectly regarded as goofs: The Boss uses the phone on the fax to call about the competition, yet the power doesn't get restored to his house until he's at the competition. -- Telephones do not need the electricity to be functioning in order to work. Phone lines provide independent power to keep communication lines open, even without main power working. While the fax machine would not work without power, the telephone could still be used.
Continuity: Farmer Hogget shears sheep yet next time the sheep are seen they have full coats.
Factual errors: When Farmer Hogget goes outside to inject his dog with a tranquilizer, he injects the serum under the dog’s skin. In actual fact, tranquilizers are given to animals in the muscle on their backs above their tail.
Factual errors: In the end credits, it lists "Terry Knapp" as "Cat and Poulty Trainer." Notice Poultry is misspelled.