New chicken owner here in SW Washington. Our 8 chickens are 8months old and we have one with a noticeable lice infestation. We have an enclosed run and coop, they do not free-range. We have hemp in the hen house, straw in the nesting boxes, and bark chips in the run. When we are treating the hen house and nesting boxes, do we need to replace the hen house bedding each week that we treat?? We could use shavings for this short period. Would we need to also treat the run area? do we need to replace the bark chips as well?? After spraying the areas with the permethrin, do we also dust the chickens with Poultry Dust? We will be adding a specific dust bath area with sand and wood ash also. Any guidance would be greatly appreciated! Thanks in advance.