So we got a baby Mallard from the store yesterday (we already have 2 ducks that are 2 weeks old and are getting pretty big) and he actually jumped out of the box he was being held in and hit the floor. I brushed him off, checked him out and he was fine. So we took him home and introduced him to Astrid and Dupont our other 2 and they proceed to try to rip his down off of him, I guess because he was another male or because they're territorial, idk which. I put him in his cage for the night and he tried to jump out ALL NIGHT, and he wouldn't stop chirping because he was alone in there. This morning I noticed him shaking his head and whenever he did, clear droplets would come out of presumably his mouth or nose. I don't know what to do. Does he have something wrong with him or do I need to deepen his water dish or something so he can clear his nostrils?