Bella started losing her teeth at around 14 weeks and is still loosing them at 16 weeks. The only way to notice that they are gone with her is if we see that her gums are bleeding. She has only lost the very front as we can tell, between the canines. The adult teeth also seem to grow in very fast, unlike humans. We will notice that she is missing a baby tooth and within two days the adult tooth has already broken through. It's a really cute thing to see all of her teeth at different stages, some babies, some empty holes and some new teeth. They are all at different heights so we laugh at them constantly :D (poor Bella!). We also got a tip from the vet to keep them from chewing up the house when they are teething. Get an old rag or towel, wet it, and tie it in a big knot. Freeze it overnight and by the next morning you will have a frozen teething ring for Phoebe. Bella LOVES lovicon hers! Good luck and enjoy the puppy time you have with her, they grow too fast!