Limping when running
Check the bottom of her foot to make sure she doesn't have an injury. If you can move her leg without squawking that's a good sign. In my flock I would take to a vet if she can't walk. I've had ones with a sprain (just guessing) that have gotten better on their own.
If you want to make sure she's okay, or feel that she needs veterinary care, go ahead and get help for her. I have one that's hobbling also, but I'm waiting to see if she get better on her own. (I think a sprain, and that will heal). I believe if a leg is broken she wouldn't be able to walk, and you wouldn't be able to move it around without her making a fuss.