Hi there - I have one hen that has bascially been without feathers for the past 4 months. It was feather picking. I took care of all the things that could be causing it and rehomed the main culprit but I think it’s just a behaviour they’ve now picked up. Anyway. My husband was cleaning their dust bath today and noticed these tiny little holes in the dust bath (it’s a wooden box) with little black bugs. They’re like tiny little holes or tunnels. I’ve checked both birds several times over the past few months and treated them with DE (just in case) so I’m thinking this is a wood mite. I’ve cleaned out the coop and hosed it down and added some DE to it , nesting boxes and none of those places have these little holes. Just the dust bath box. I guess I just want to confirm that mites don’t still holes in wood. Lol. Thank you!