My two week old Harlequin drake has super thin down. When he's wet, you can see clear through to his skin, whereas his sister you can't. She has very nice thick down. The little drake is also bald on his chest and neck! (The down on his chest used to be all weird and curly) I clean their brooder almost daily, they have good clean water and good food. The hen is totally fine, no weird issues, so I'm wondering what might be the deal with my drake?