Hi everyone! I have a Yorkie baby who is a bit more than 20 weeks old, he weights 3 pounds 9 oz tonight after dinner, I think he is on track to be a 5 pounder as shown on the growth chart. The thing is I don't think he is thin, but he is already 8" tall and 9" long (back). As I read from internet saying that full grown adult Yorkie should be this size, I'm a little confused. And the breeder told me her Yorkies stop growing early, the bone structure will not get any bigger. Is this true? Is my babe going to be a much bigger sized Yorkie?

Many Thanks!!!