I had my Pel for almost 10 years all by herself, the kids begged and begged for another one, my little pel-pel doesn't really like other dogs she doesn't play well with others lol, so I decided around 2 years ago to get another one
things were alittle ruff at first because the puppy wanted to play and pelpel only plays with humans. Pel-pel is my dog she must be where I am, and daisy has turned out to be my daughters dog her little buddy she calls her, so it worked out just fine. they still have their little moments but I am so glad I did it. We have also decided to add another to our family we will be picking him up hopefully this weekend. I will stay in touch and let you know how that goes.
good luck in your decision.
some one once said "yorkies are like potato chips you can't just have One"
That is so true