I went with a family member today to see a 9 week old yorkie she is getting from a friend soon. It is a little female and we had Kyra with us. This is the most aggressive little one I have ever seen. Kyra tried to play with her and she would growl and attack her. She is still tiny so there was no damage, but is this normal for one that young? I have never seen one behave this way before at such a young age. She is getting this baby free so I doubt I could talk her out of it, but if its going to be this aggressive later in life I won't want my babies subjected to it.