They are absolute lunatics. I have an isolation area which allows them outside but they are away from the others until I'm satisfied thay are happy and healthy. It's not big, about 12'x12' not including their coop, plenty to move about in and scratch.
Last night trying to get them in, the mad one went for me! I finally managed to put her and her sister to bed after half an hour's running around, much to my husband's great amusement. I now have a six inch long scratch down my arm where she got me. They are the quickest hens I've ever seen - must be something to do with having 5 toes!