Glad you found him. He is probably very very sore. Good work with the emergency chair. Put vitamins in his food and give vitamin E gel caps, 1 big gelcap 2X a day for his size. Put a hole in the cap and squeeze into his beak. Vitamin E seems to help with many limb problems. I had a roo who was injured and could not move his legs, it took a few weeks of vitamin therepy but one day he got up and kept going. Give him some time to recoop. Also 3 baby aspirin to a gallon water , dissolved, then give him some, can help with the pain.