Hi, my girls were itching like mad and I suspected mites, as there were no lice present. I had suspected the straw that I had bought in and duly treated all of them. They have stopped itching, but I am worried about two of my girls who are rearing their piglets at the moment, as they have very waxy ears and seem to have slight redding around the outside/lower part of their ears. I have checked the other girls and the inside of their ears seem relatively dry and clean - is this normal or do I need to treat with something?