I noticed my roo hopping on one leg when I let the flock out to free roam after work today. He uses he wing to balance on the bad leg side.. Also when he stand to take a break he hold his bag leg up. I got a hold of him and looked under his feet.. They both look the same with no obvious sores. They have been locked in the coop for 2 hours and he is just laying on he coop floor and breathing a bit heavy. He is usually on the roosting poles. Not sure what to do.. Any help? Thanks.