Sammi's 2 adult fangs (she had doubles) came out about a month ago and she is 17 months old...My moms maltese lost his last baby tooth @ 2 years old...I guess it depends on the dog...My vet said when they are ready to come out they will...But he wanted me to wait til she turned 2 before i pulled any...Now shes got all her adult teeth in and no baby ones