Hi there, 
Your baby looks healthy to me ! Has she been to the vet? Yorkie's come very tiny, to over 20 lbs. As long as she is over 2lbs she is in good shape. AND she has no health problems. Your going to always have to be careful with her and make sure she is not jumping off couches and beds. She is so little that any fall could seriously hurt her. 
  anther thing that people worry about with tiny Yorkie's are hypoglcemia, and liver shunts. More common in the smaller ones. 
  enjoy her, and love her. She is precious.