Using Dawn dish soap is also a safe and effective way to kill any insects, like lice or mites, on your chickens (or any mammal for that matter). I used to Dawn bathe any animal, bird or mammal, that came to my facility that had mites, lice, fleas, etc. Use warm water, lather the Dawn over the...
Instead of using a pesticide like Raid or some other poison, I use 8-in-1 Mite and Lice spray. It is made specifically made to spray directly on birds. I was a wildlife rehabber for decades and I used it safely on every species of bird, from juveniles to adults. It has the added advantage of...