We only had 2 ducks. a peking hen and a WH drake. last night we heard a commission. when we checked we found the hen in distress in her pen. we took her inside and tried to revive her. she coughed up about a cup of water and her belly was wet but not her back. she died shortly after. the only water around was the duck pool which is about 6 inches deep. she could stand up in it. we think she drowned but can't figure out how. it was about 40 degrees last night. couldn't find evidence of a predator and the drake and chickens were calm. any ideas on what might have happened or is there something else that could have caused her to cough up that much water?