1 of my yorkie baby passed away 4 days before her 17th b-day she was 2.5lb. I have 3 more. one of my boys is 4y/o and is 3lb, my baby girl is a little bigger she is 5y/o and 6lb, and my tiny baby is 2.5lb at 1.5y/o. he was almost 16 oz at 3 months old