I used Sergeant's Gold dog shampoo with permethrin to gently splash my rooster's feet and legs (all the way to his elbows) and I did it for 5 minutes, then rinsed thoroughly with cool water. Repeated in 2 weeks. I coat all roosting boards weekly with food grade DE. This seems to work - so far have not had any more problems. I sent some photos to Dr. Brown and he said it looked like a classic case of scaly leg mites. As soon as the weather warms up I will clean thoroughly and re-whitewash both my henhouses then coat the floor with DE, sweeping the DE into the cracks between the 2x4s. I find that DE solves a lot of problems and I can't do without it - I use up about 10 pounds of it every 6 or 7 months. Keeps everything dry and I notice much less scratching and preening when I mix it in with the pine shavings, which I am currently mulching, but in hot months, I change the shavings out every month and apply the DE liberally to the floor before putting the shavings down.