Hi, I have a 6 week old lavender orpington chick who can walk, but when she turns or bears weight unevenly her legs will buckle. At first I thought it just affected the right leg but appears to be the same on the left side now too. This has been developing for about 3 days. She is bright and eating drinking fine, she can run when she wants to keep food away from the others but will buckle when she does so. Her adult feathers have also come in quite ragged. They have been vaccinated for mareks but this was only a week ago - I know it is meant to be done in day old chicks but we weren't able to source the vaccine until much later. The other 6 chicks are totally fine. She is a lovely chick, so friendly, and I would hate to lose her. She is on meloxicam and have ordered a vitamin b supplement