You are not going to kill lice and mites with garlic and wood ashes. You need to buy some poultry dust to kill those little buggers!!Thank you all for replying. Our hens have had mites for a while. We have been giving them garlic in their food and we have been putting ashes out for them to dust bathe in. They are the good laying breeds, Plymouth rocks, buff orpingtons, brahmas, hampshires. A few other breeds. They had not had oyster shells for a while but they are now getting it. They were eating a lot of their eggs. They get vegetables scraps from the kitchen sometimes. They never get breads or meats. Thank you so much. Jesus is ALIVE!