Welcome to YT, jazzman! Although Toto [our 19 month old girl] is the first Yorkie we have had any experience with, I can't imagine that kindness and love would be turned down by a Yorkie regardless of age and disposition! I think if would be an admirable thing to give a home to a senior of this breed! He may be "set in his ways" at 15 years but I would think that lots of patience and love would overcome any undesirable traits!!