hen almost 12 weeks old cockoo maran

I have 12 week old hen. Noticed whe she was approx 2 wks amd thought she had splayed leg and taped her legs for awhile. Have her in house in cage but seems to be getting worse. Now she is not putting any weight on her good leg either. her right leg was ok and her left leg was out behind her. now she holds her left leg up bent and is not putting any weight on her right leg. she puts the right leg out straight i front of her. what can i do to help her. she is alert eats and drinks but getting more difficult for her to move around.