I'm going to be as detailed as I can with my situation involving my pekin duck.I got him as a duckling in mid july.He has been growing into a very happy duck up until the past couple of days.Suddenly I notice that he isn't behaving normally and is acting very strange. This past saturday,I was outside doing some yard work and he was there with me just roaming around.I saw him walk slowly to a spot and he just layed there.If he wanted to move to another spot,he would drag himself instead of walking.I also noticed that he was shivering and he would be like half asleep without hardly moving. The following sunday,I had to notice a very disturbing event.He was eating when suddenly he just starts falling backwards and doing these weird movements and twists with his body.I didn't want to touch it feeling that I could hurt him somehow.He soon come back to normal but it was very disturbing to watch. On that same sunday,he was in the pool and he wasn't excited as he normally was.I take him out and he refuses to preen his feathers.If he tries he will fall back and will have trouble keeping his balance.So I dry him with a blow dryer but honestly,his feathers look like a mess and quite ugly. I don't know what else to do,any help please??