For our hawk problem, we put up a fence and put string, in a criss-cross spider web like pattern, over the top, and we haven’t had anymore problems with the hawks. I think the hawks think it is completely covered or something...
So my Barred Rock had the same problem as mentioned in the pictures shown. I sprayed her with some anti fungal and bacteria spray, cleaned her, and put some stuff called green goo on her, and now she looks a little better. I also dusted and sprayed her for mites/lice.