I haven't decided about spaying yet. I thought she must be about full grown since she hasn't grown much in the last couple of months. I've had other yorkies in the past but they lived to be 16, 13, and 8 so it has been a while. We also adopted Bogart last year but he was already his adult size. Why did you ask about spaying? I am really undecided at this point, but if I decide not to breed her then I will definetly get her spayed.