I recently incubated and hatched 4 beautiful and vibrant little mallard ducklings. It is day three, I just finished giving them their dinner when I noticed two of them bobbing their heads and bubbling at the nose and mouth. I do not understand what is happening. They seem able to breath, its been ten minutes and they are still alive and kicking, so I really don't think they are choking but still, they keeping bobbing their heads and any new water comes bubbling back up the color of food. Its not like I let the little things gorge themselves so I really am at a loss to what could possibly be going on. I really hope some one is awake and reading out there because I really don't want to wake up tomorrow morning to dead ducklings... I could really use a hand here....please.