Hello, my duck is going through what seems to be very similar problem since yesterday. He/she? is an indoor duck but it is not hot where it is. Has cage with straw, but not moldy. Has a large free area with large water area to play in. It does not have yellow around the eyes, but then is a black duck. Yesterday morning it could not quack, kind of whispers instead. It did sneeze but only once. Trying to tell me something is wrong too. Eats and drinks fine and active, but sounds pitiful when it tries to quack. Anyone have any other ideas besides temperature or hay? Thanks, as I am rather worried.