I just went out to put my chickens back in their coop so the dog can go out. I noticed my 3 month old mille fleur roo would not come. I went to fetch him. he flopped on the ground with wings spread. I picked him up and cannot find anything wrong but the behavior is not normal. I brougth him back to the coop and put him inside away from the others. I noticed he stood up but did not put any weight on one of his legs. That is also the side where he will extend his wing. When I went to get him, he laid down on his breast bone. I cannot find anything wrong with him yet I suspect he is injured. I suspect a leg b/c he does not want to walk. What do I do? update: He's standing just fine but will not walk. Just flops on the ground with wings spread. Could he of eaten something? I did find his gullet to feel like it was full of air.