Hello, I am dealing with a mite problem and I have already cleaned out all bedding and used a 10% Permethrin spray on the housing (1.2oz for 1 gal of water) and I dusted DE around the place to help but many people say DE doesn't get rid of them on the birds if they are bad...is it okay to spray Permethrin on the skin? It says you can use it on the skin of dogs in nasty cases but no great info on using it on chickens...