Hello Everyone! I am really new to the yorkie world so please bare with me if i dont have the right terminology.

Flynn came home to us this week. he is 4mos - 3.4lbs. My sister adopted his brother as well but Flynn weighs about a 1lb less than his brother and his brother has a bit more hair. I sense flynn was malnourished a bit. I have a 7mos old Parti Yorkie too.
All I know is their mom is a gold yorkie. By looking at his pictures can someone tell me what type of coat he will have? The top of his head has a silver tone and his super soft and silky and so are his legs. BUT the top hair where all the black hair is dry, dull and thin - kinda looks like he has split ends. New growth is coming in, and changing color. Do you think the new growth will be a silkier feel like the top of his head? Thank you for any help!
flynndb.jpg flynn5.jpg flynn3.jpg flynn 6.jpg