Character mistake: When Nanny says, "Look, here's Lucky!" the puppy she picks up does not have a collar on, therefore that cannot be Lucky, as Lucky is one of the original 15 with collars. (01:16:48)
Character mistake: In the movie, Gregory Peck claims that he speaks German "perfectly." But in the scene where he uses the dead cliff guard's radio, he speaks with a noticeably thick - and highly un-German - accent. (00:57:22)
Character mistake: Mitch and Hecky are experienced ranchers - so why, when they are all camping, would they leave all the food out in the open within easy reach of bears and other wildlife?
Suggested correction: Is this in reference to when Vicky throws the food everywhere? Mitch is obviously already up and about in this scene as he is wearing shaving cream. That may be food he has put out for breakfast for when everyone else gets up.
Character mistake: On the side of the boomerang box, there are words reading "Return's to owner." It should read "Returns to owner."
Character mistake: The registration number of the stolen van is GPW729 but every time it mentioned in the dialogue it is stated as GPW927.