Hi, I just got 6 welsh harlequins 2 days ago. About an hour ago, I noticed one duck started chirping very loudly. His neck is arched, and he occasionally is falling on his back and can't turn himself over again. All the stores near me are closed, so I can't go get any antibiotics or anything until morning. What can I do? EDIT: I have replied twice, but neither comment is showing up. My duckling didn't make it. I suspect pasteurella. I have been putting brewers yeast in their water, but I'm not sure I'm putting enough in or not. Should I get some antibiotics for the others?