My rescued pigeon, that I have had for 4 years is acting strangely. He does not fly (a biproduct of an injury when he was very young) but he does walk around etc just fine. Yesterday I noticed he continually seemed to be in the "sleep" position, laying down like a hen on an egg with his head down. When I would try to arose him he would attempt to walk but would use his one functioning wing and flap it up and down. It seems like he either couldn't get his balance or was favoring one of his feet. I have picked him up and looked at his feet but I can't see anything unusual about either one of them. He does not like me touching one of his feet though. He does from time to time just flap that one wing as if he is trying to switch positions. He has moved from place to place across the cage (a 2 x 3 foot wire dog kennel) but I haven't seen him eat or drink since yesterday morning. Any ideas.