I had Rosie as an only pup until she was four. I then added Mikki who was a year old. There is there only one thing sweeter than having one yorkie, it's having two. I love watching them play. I love hearing their nails on my wood floor as they run through the house together. I love seeing them together. Not all experiences of having two are bad at all. Have you thought of getting a little older dog to go with your puppy? Maybe that would help with only having one to train. I will sum up with this, adding my second yorkie was a great decision for us. Mikki completed our family.