My silkie rooster was worse than that when I got him,I didn`t know anything about mites so I took pictures like you and posted them on DG and was given this receipt and it worked Dip legs in mixtrure of 1 part kerosene, 2 parts raw linseed oil.Repeat at 7-day intervils for 3 weeks. In between I used the vasiline.Some have said bag balm works well instead of the vasiline.Silkies are prone to leg mites I have learned since then