sorry i have SOOO many questions! Hazel is my FIRST dog EVER! this is all new to me. she is currently teething. i try to ease her chewing with plenty of toys. but my question is are all of her teeth going to fall out? someone told me the other day that they lose their baby teeth!??!!? i just assumed that the teeth growing in were the ones that were going to be in her mouth forever. so they lose ALL of the teeth or just some of them?