They are probably in her ears as well, causing her to be off balance.
You need to do a few things and you need to do them quickly.
- Bathe her with flea and tick puppy shampoo.
- Apply seven dust to the coop or nesting area.
- Once she is dry, apply seven dust directly on the bird
- And there is some injectable stuff that you can put in their water's that will knock the mites through the blood stream. I've been out of poultry for so long now that I can't even remember the name....
And you need to spray her with Adams flea and tick spray daily. On her crest, under her wings and around her vent.
Depending on how far infested she is, you also need to provide her with extra nutrients to replace those that have been lost.