My six-year-old hen has a lame leg. It came on quite suddenly. I let her out then checked on her a few minutes later & she was laying down with one leg not working. When I noticed this I inspected her and saw she had little light orange bugs in her feathers. Mites? Fleas? Dusted her with diatomaceous earth and used some herbal liquid on her skin. The bugs appear to be gone now. But her leg is still not working. A couple weeks prior to this I noticed she would scratch her head when she was out and about. I figured she just had a few mites or something and would dust bathe them away. I'm wondering what to do here or what caused all this. Could those bugs have caused the leg issue? Also wondering what those bugs were. I want her to be able to walk around and chicken around again. She is otherwise perky and laying eggs still. She even manages to jump up into the nesting box. She also is eating and drinking. Her other leg is strong. Thanks for any help!