My 4wk. old blue silkie has developed an odd odor. I'm not sure what it is. She's healthy and thriving, but her "sisters" in the brooder don't smell at all. Also, when she fluffs around in my lap on my apron, there's little black dandriff/debris left behind. I know she's to have black skin, but she shouldn't leave anything behind, and that smell...! I hope it's not mites or anything like that...again, she's the only one. Is this a silkie thing?!? Thanks...confused.