Hello wonderful people I am here looking for help! Two weeks ago I noticed my he had a dirty vent, which at first I assumed was mites. But now believe it to be a case of lice. I immediately started giving her and the rest of my small flock Dusting Powder with 5% carbaryl. Two weeks later the other five hens and one rooster still seem fine. But the hen continues to be fighting the lice. And yesterday I noticed her comb appeared very dark in purple. And she seems very tired and doesn't move much. She is still eatting and drinking (pretty sure no eggs). Today we've moved her away from the flock into our warmed shop with water. I would love to see her return back to health. But am worried I may end up losing her. What should I do? Is she suffering from respiratory illness and lice? What should I give her?