I do understand people being disappointed when they pay big bucks based on size promises that don't come true. But trust me, you'll grow to adore her, and won't be able to BELIEVE you ever posted this thread!
A couple of points:
**Both the breeder and the vet originally sd. my Kiki would be around four lbs, but the puppy growth chart estimated her for 7-8-lbs and above!
Well, she's almost a year old now, only weighs five lbs, and has only gained one lb. in the past five or six months. Of course, she could hit a big growth spurt and gain another three lbs, who knows...it's just a fun process to watch!
**My Mazie weighs less than three lbs, and is very fine boned, and Kiki is five lbs with very broad shoulders, etc. When I see them together, Kiki looks huge. But then when I look at Kiki by herself, I think, omigosh....she is a TINY little dog! And even if she gains one or two more lbs....she will STILL be a tiny little dog!!!
**With the huge dog you already have in the house, I really think you'll end up being happier if Zoe is bigger than you originally thought!
**And finally....she is adooooorable! Really a very beautiful and sweet example of a yorkie baby!
Good luck to you both!