Katiedarling, if you have access to ashes (like from a firepit), they are great for mites, too. Mix them in the ground where the chickens like to dust bath. I put them in their 'sand box' area. I found one of my older birds had mites this summer, so I added the ashes, Gave the birds a shake and bake bath in Sevins dust, and put dog mite drops on their necks. The full monty! So, I don't have mites anywhere now, thank goodness!