Like everyone above said, i would wait for a litter and see what you want then. I would not add a Chi till after the babies are born and raised.
I have 2 yorkie girls, i would not add a third because i would not want to upset the apple cart, they do so so well together, they almost like twins, they do everything together. Where the one is there the other one will be, but if i was given a choice like you, i would definatly have another yorkie
