I have a 4 week old golden sex link, she has been in the coop with the other chicks for about 2 weeks now. They have pine shavings, and a heat lamp since it's still pretty cold where I live. Today, I went into the coop to check the food and water and saw the GSL sprawled out on the ground. I picked her up thinking she was sleeping and she was shaking and kept crying when she tried to stand up. I read on another BYC post that it is a slipped out tendon. I pulled gently back on her leg like the post said to do, I think I felt a pop but I'm not sure. I also tried doing the chickens chair with a painters mask and a box, but she kept falling out of it.. Any ideas?? She is in my room on a blanket with pillows surrounding her and a heat lamp on her right now.