Chickens have mites!

[Alicrawf914]

My chickens have mites. What have you guys had the best luck with for treatment? Do I gut the coop out first or do I treat the chickens first? Im somewhat new to chickens and this is my first mite problem.

 

[Painted Calls]

Here is a good place to start. Good luck!
https://www.backyardchickens.com/threads/thoughts-s-about-mites.1408596/post-23124940