3 month old pullet started limping today. She looks like she's off balance but I examined her leg and observed the way she walks and it's the left "hip" that's wrong. It's not broken, swollen or hot. If I hold the chick by her body she keeps her left leg straight while the right one is normal. When she stands or walks the left leg is kept at an inward angle (more under the chick) but she carries weight on both legs. She's ring marked on her left leg - could it have caught in something and she's pulled a muscle or something like that? She's kept by herself in confinement at the moment. What should I do to get her better???