Chicken Broke his legs

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My 2 month old chicken jumped from the balcony on the 4th floor and broke its leg ! Now she cant stand up and cant walk. What can i do ? i think the problem is in the joint maybe joint a in the image but not sure !
what can i do ? please help

 

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I had one do this. I put her in a quiet cage with food and water. I wrapped her leg with splints made out of foil and gauze. It took 2 months but eventually the leg healed. She has a bump where the Joint healed and she walks with a little limp but she gets around fine and she is 10 years old.