We have two and I recommend at least that many. Yorkie's are social little ones and they need a playmate IMO. Laddy was such a handful until we got Lolita. Now he has someone to play with when ever he wants (He wears mom and dad out fast
) In general he just seems so much happier. I am not sure I could of done another puppy at the same time but Lolita is 5 and a rescue and has been a dream come true.