This is my first time posting and a new chicken owner. We have 6- 9 week old girls. Yesterday, one of them turned up lame. She can't stand up straigt and her right leg looks turned out on a 90 degree angle. Also a couple of her toes on both legs can't straichten. Needless to say she's hobbling around. Has anyone had this experience? Any suggestions about what might have happened and what we should do.