Our little girl had 2 rows and I always felt nervous putting her under too. The vet told us they must come out and will not fall out on their own but wait until we spay her. Well, we were not sure if we would mate her and hesitated on the surgery. Sure enough 2 fell out (the longest roots I have ever seen) on their own, it took another few years for the others to fall out naturally. I think we were just lucky though, she has gorgeous teeth and now only a single row!
