On that one all I can say is you have more guts than me. I spend so much time entertaining and playing with Sydnee I don't know if I have the energy for what would essentially be twins. Because I would want to get one if I did about the same age so they would be on the level of maturity.
However their are others on here that have 1, 2 and even three Yorkies and do it well. I am just a new Yorkie mom of only 2 months.
But you go girl go, if you have the stamina for it, never can have enough fur babies.