I agree with your post...both of my yorkies are housebroken, one is 4 months old and one is 20 months. My 20 month old knows many commands and knows how to behave wherever we take her. I will be teaching my four month old the same commands and I wonder if he will be even easier to train because he came to me already knowing how to walk on a leash and potty outside. with my 20 month old though, do feel she definitely has some sassy in her personality despite being so obedient lol. I guess that is just her yorkie-ness
My boy is just all sweetness so far lol.