Hi, just recently, within the last week or two I've noticed my 2 year old peking drake to be a bit clumsy on his feet. He looks as if he is a bit off balance and falls down on occasion. Almost as if her can't stand on his feet. He seems to be a bit more quiet than normal and I was wondering if he may have gotten a bug of some sort. When I go to catch him he can run away but there are times he just seems off. What should I do to correct this problem?