Will the passenger side airbag deploy, if no one is sitting in the seat?

I do have a doggie seatbelt, but unless I put her in her harness--which she doesn't like--it would probably snap her neck on impact, but I am sure you're right that the bag would do as much harm as it would to a baby.

Bag deployment all depends on how much weight is in the seat. It should be explained in the book.