Trivia: Stan Winston's face was the model for the Wolfman.
Trivia: To keep things "real" between Dracula and the kids, Duncan Regehr would not interact with the children in the film unless they were shooting a scene. He wouldn't speak to them, eat with them, or acknowledge them at all to keep a wall of distrust up with them. After the film wrapped, it was reported he treated them and their families to dinner to celebrate.
Answer: It's unknown how the dog got into the treehouse. After the boys put their hands on top of each others, the dog puts his paw on and Rudy questions how the dog got in with none of the boys being able to give an answer.