I have three mallards (4 weeks old..about ) and a1 wk old pekin. Ive noticed that the smallest mallard has been sneezing occasionally and has loose stool and diarrhea. I cant blame it on the new guy because this started a day or two before the pekin came. There doesnt seem to be any other symptoms such as discharge from eyes or nose. I do let them out and forage in a pen during the day (supervised). Could he /she just be more sensitive to diet and environment? What should I do? I havent been this neurotic since my first baby ! Help !