Some of my chicks look to have blue forming at the edge of their beaks. They are recovering from a respiratory infection because my Denagard is taking FOREVER to arrive. They aren't congested anymore, but still have a small sneeze every once in awhile. Could the sneezing cause the change in beak color? I tried searching for an answer...but I couldn't find anything. The change in color is only around the edge of the beak on some of them, and on others the whole "quick" area of the beak seems to be getting darker. No other part of their face is changing color.