The coops are all wood, I lime wash them twice a year but I don't think I get it into all the cracks. I have two pens of mixed layers, 7 in each, the boys are in their own pens at the moment ( very upset !)
Then I have pekins and growers in a separate area, they are all mite and lice free so it's all my old coops, some are very dilapidated so time to make some new ones I think.
I am on top of the mites, it's the lice that are proving hard hence the red stop question. I move my enclosures every couple of weeks on to new grass so I think the lice problem is of my own making as they don't have time to make proper dust baths, think I will give them some trays but keeping them dry is a problem