So I was looking at Bear and the gang`s teeth this morning, as I do often and two of Bear`s top front are missing. Her incisor on the right side has seemed to break in half. We haven`t been playing rough with her as I know puppies start to lose their teeth at this age. Is 15 weeks a bit young to be losing these teeth? Should I be concerned about her broken tooth? It doesnt seem to be bothering her.