Well I went to deal with my ducks this afternoon (I had to quickly get up and go into the big city for a CPR course) and When giving them their feed, and changing their water. I heard one wease. It hit me that its been doing it since I got them, but now its more noticable and louder. Their weren't in greatest health when I got them. (their a rescue). What could help? Im thinking veggies (like a mixed of corn, peas carrots) thaw, with a sprinkle layer of bakers yeast.