This question occurred to me upon repeated viewings of Scooby-Doo on Zombie Island.
Several times in the movie, Scooby-Doo hears another character referring to a dog and seems to not know that he's the dog they're referring to. I realize this may be a simple recurring joke but this got me wondering, does Scooby-Doo know that he is a dog?
Here are the relevant lines from the movie:
Simone Lenoir - Who brought this-this dog?
Scooby-Doo - Dog? Where?
Lena Dupree - But I'm afraid your dog will have to eat in the kitchen.
Scooby-Doo - Dog? Where?
Simone Lenoir - I've had enough of that meddling dog!
Scooby-Doo - Dog? Where?