hi john. sorry to hear of this. its not the first case I have heard of a bird hurting himself from a fall.
you are doing correct by letting his wings grow back in.
Best thing to do, is when he is out and his wings are growing, to keep him low to the ground and the area around him cushioned. you might wnat to keep him near you on the couch and dont allow any unsupervised time out until you know he can hurt himself anymore.
I have had friends who have had to have several surgeries to close up chest wounds as they are very tough to keep closed and heal properly.
the biting might be misplaced aggression or excitement. My Sydney does alot of both, but i have learned to read his body language to tell me when he is thinking about biting. I usually tell him to calm down and distract him. that usually makes him forget about the bite.
good luck.
