My puppy Chloe's hair on her head is falling out. She looks like a balding old man on the top with only a few black wisp left

When I took her for her first check up from the breeder they found tons ear mites. I have been treating them since with ear drop medication once a week for a month now that my vet prescribed. Even when I first got her the
[COLOR=green ! important][COLOR=green ! important]hair[/COLOR][/COLOR] on her muzzle was short and dark rust colored like on her little legs, which are also have very
[COLOR=green ! important][COLOR=green ! important]short [COLOR=green ! important]hair[/COLOR][/COLOR][/COLOR]. My vet says not to worry it will grow so does her breeder. I used this breeder because I love how my sister in laws Yorkie's Toby hair turned out long and silky at 3 years old. My Chloe has the same parents as her Toby but my sister in law says Toby's hair didn't look like this when he was a pup. Is their anything I can do? She a real sweetheart and I love her so much. This picture was taken a few weeks ago it is not even possible to put a bow in now it is only about 1//8 inch long.