I need advice on how to get rid of these mites! I live in an area that is consistently below freezing, it was -20 all last week and we've warmed up to 20Farenheit. So I'm thinking a spray is not the way to go right now as I have no other place to relocate my 16 birds, and the guinea and rooster are near impossible to catch. I believe they're northern fowl mites. Our brahma just passed last night after treating with permethrin spray 4 days ago. I feel terrible she got so bad but after giving birth recently, I havnt been able to be as hands on with my birds. Also, she was always a slow bird, content on being by herself and also prone to health issues, I discovered the mites when I was trying to treat her eye again.
Today, I noticed my Easter Egger laying on the floor and only willing to open one eye, she was laying 2 days ago and I didn't see any mites but I gotta believe she's got some and I don't want her to pass too
What do I use to treat them?! And if there's a powder could I add it to sand in a kiddy pool for them to bathe themselves in addition to treating them?
Today, I noticed my Easter Egger laying on the floor and only willing to open one eye, she was laying 2 days ago and I didn't see any mites but I gotta believe she's got some and I don't want her to pass too

What do I use to treat them?! And if there's a powder could I add it to sand in a kiddy pool for them to bathe themselves in addition to treating them?