I have two Yorkie girls. I got my second one about a month ago. They both get along great. The only problem is (My oldest Ruby) gets very jelous of Bella. Ruby has been trying to "punish" me for Bella being here even tho they get along great and are best of friends.
Ruby is 100% potty trained yet she'll pee some times on my bed if she sees Bella sleeping with me. She has started to act out by barking and going in places she knows she's not aloud and has never wanted to go before. She's been getting into a lot of trouble lately it seems. I pay as much attention to her as i did before Bella came and I actually pay more attention now to Ruby then Bella because i was affraid of her feeling left out. It doesn't really matter what you do, the original Yorkie will feel a little jelous for awhile. I know it will go away eventually, i'm just not letting Ruby get away with any of her bad habbits she's starting.
It is great tho having two because they have someone to play and get into trouble with
