Hello everyone, I'm seriously concerned with the current weight of my 4-6 lbs. teacup Yorkshire Terrier. She is almost 1 year old and looks frail compared to that of other Yorky's that we see despite providing her with food on a more then normal basis. This is my first dog and I'm concerned that their may be an issue that needs to be addressed with a Vet but I wanted to come ask everyones opinion first since vet visit are expensive and I'm saving up to move into a new apartment. Her behavior can be described as very excited, playful and lovable and never shows signs of lack of energy. I would really appreciate any feedback or questions regarding this issue. Thank you for your assistance in advance.