I have one yorkie and really feel he needs a friend. A few people have told me that if you have a puppy and get anther the dogs bond with each other and not with the owner.... I am thinking potty training two would be as easy as one but I am afraid that Chewy would revert backwards.... he is doing soooo well right now, he is only 4 1/2 months old... my little man! My daughter wants a little girl and so do I... any advice, or thoughts on this?