I just got my ducklings from Metzer farms today, and they were all happy and healthy. However, one of the ducklings(a White Crested, btw) has its head tilted up and appears to be trying to swallow. It drinks plenty of water, but it seems to have a sort of mucous in its mouth. So my question is: Do I need to do anything for it and, if so, what? I had the same thing happen with one of my ducklings before, but that was seven years ago and I've forgotten what I did! I do know it turned out just fine, but I'd still like to know what's going on. I wouldn't wish to have my little duckling choke to death. Kind of worrisome.