These are the things I’m using.... He is a Pekin duck and one hock joint is not bending right. He is able to bend it the correct way to sit down but when He tries to stand it’s almost like it over extends and tries to bend the opposite way. I think it may hurt him to stand on it so he primarily stands on the other leg to compensate. I will take a video of it to send tomorrow since it is late tonight. Thank you so much for your willingness to help. I just wanna try to help him the best I can.