Hi! We have a sick 4 week old Pekin Duck. Wings down, trouble keeping it's head up in water and not interested in eating or drinking. Breathing seems normal. No discharge from eyes or nostrils but it has diarrhea. Please help. Any suggestions are greatly appreciated. I don't want to have a crying 14 year old boy on my hands. He changes the bedding in it's cage three times or more a day along with changing food and water.