I have a 10 week old chicken who is having leg issues. It started in her right leg and all of a sudden switched to her left leg. At first she would just lay down with her legs kicked out and seemed to have toe Paralysis which went away in about a week after about 5 days she was attempting to get up and move about but seemed to have trouble moving her leg forward. She would constantly come down to knee and rest on it. The out of the blue her right leg healed and switched to the left. This whole deal has been going on for about a month now. I have been treating her with vitamin b12 daily, probiotics and electrolytes daily with plenty of fresh clean water. She has been eating normally as well. I have separated her from the rest of the birds and brought her inside and have been keeping her in a chicken sling. Any help with the situation would be greatly appreciated. I have read about mareks and I do understand the possibility of it, but I do believe there has been forward progress at one point.