Annie was 21 weeks when she lost her front teeth on top and bottom. I never did find one of them. Guess she swallowed them all. It was quite funny - she ran around with her tongue hanging out of her mouth for about a week or so. We are still wating for the K9s to fall out. Hopefully on their own ;-} It gets expensive to get them pulled. But, she gets spayed at 6-1/2 months and if they don't fall out I am going to get them pulled. I don't want to worry about future problems. Good luck, this is our first Yorkie also.