Continuity: When Verne is trying to return the food to "its rightful owners", and pushes RJ into the ground, there are no toys near. Yet, in the following scene Verne appears, the two toys appear two inches from his feet.
Continuity: When Verne first left the group to cross the hedge, he came out in a back yard. However, when he returned to the forest, he entered the hedge from a road, but ended up in the same place he left from, in front of the group.
Continuity: When Verne's shell falls off, his tail is missing.
Continuity: When Verne gets hit by the bike and hockey stick and goes through the hedge, there's no tire track on his shell while flipping through it until he shows R.J. the bike track.
Continuity: When Heather the possum gets kicked down the stairs by Gladys, Gladys has a coffee cup in one of her hands. When Gladys walks halfway down the stairs, she's not holding a coffee cup.
Continuity: When RJ first sees Vincent's cave it's atop a sheer, vertical cliff (so sheer he can't climb it and has to use the fishing pole to gain entrance). However, moments later, when the wagon of food gets bumped out of the cave it bounces down a more sloped hill with lots of ledges and rocks.
Revealing mistakes: When Verne and RJ are fighting over the wagon full of food and RJ falls to the ground, the dog's chain is not in the picture, but when RJ starts to stand up, the chain is underneath him.
Continuity: RJ caught the grappling hook on a root and left the hook there after pulling himself up. Later the root disappeared and although RJ never returned for the hook but left for the town right away, he still had the hook and used it several times.
Continuity: Before being pulled off the Verminator van, Vincent severely scratched the roof with his claws. Later (when the van crashes into the house) the scratches have disappeared.
Continuity: When Stella is first showing off her makeover, her whiskers are white. Later, when she is talking to Tiger, they are black.
Continuity: When Verne gathers sticks for the animals to eat, it zooms in on him picking one to eat. Yet it shows him picking up a piece of bark to eat.
Continuity: When the animals are in the Verminator's truck, RJ tries to enter through the driver's side window which is closed, yet moments later, when trying to escape Vincent, he jumps in the broken passenger side in, and is tossed out the now open driver's side window, even though nobody had opened it.
Factual errors: Turtle's shells are built into their skeletons, so Verne's shell shouldn't be able to come off.
Factual errors: Many of the animals depicted as hibernating do not actually hibernate; including the squirrel.
Errors made by characters (possibly deliberate errors by the filmmakers): The exterminator calls the opossum by an incorrect Latin name "Didelphis marsupilus virginiana"; the actual Latin name is Didelphis virginiana.
Continuity: The tape measure that Hammy is holding disappears then reappears.