Or have the attack of the Pseudo Mites…When my gals started losing bum feathers, I was so convinced they had mites - they got dusted, entire coop and run got treated. Never saw mites, but was so convinced it had to be pests. Turned out just feather picking and the solution was to more than double the run size.
I thought they would freak out with building onto their home, but after the first day they watched with intent interest, inspecting every step of the build. When all was finished and we opened up the two sections, the ran in and explored. I am convinced the gals knew this was all for them.