Continuity mistake: Immediately prior to pushing the lizard down the chimney you can see teeth appear in the dodo's mouth for a few frames. (00:23:49)
Suggested correction: And how would that happen accidentally? The animators would have to deliberately draw the teeth. It was obviously done for effect. It is even done later in the scene. Most likely, the mouth wouldn't read correctly for certain words if teeth weren't visible.
Continuity mistake: After being pulled toward the Rabbit's Cottage by the White Rabbit, Bill's feet change. They change back when the ladder is being set up (almost exactly 10 seconds). (00:23:09)