Sounds like you are doing a great job with your little one. I am sure you have posted your baby's age, but please?????
These are my "Seven "P's" of Yorkie Training", hey they work for me.....
Patience: Please be patient with me, we speak different languages and I might not understand you, you speak with words and I speak body language. If you will teach me in a way I understand, I will learn. NEVER FORGET you love me, but you are MY LIFE.
Perservance: Never give up on me. Remember, I am a living being and have a mind and will of my own. Please work with me and allow me to be ME.
Persistence: Please, please, remember that your persistence in training me to be obedient may save my life. If nothing more, please require me to come when called and to sit on command. If I have learned these two lessons well I will trust you and obey you in times of danger.
Play: I NEED TO PLAY, fun doggie games, so please take some time to learn how to play with me.
PEE and POOP: Don't forget that if I need to pee or poop I will be uncomfortable and will not be able to learn.