I have an Easter Egger that is acting funny. She is eating and drinking, but she is not acting like herself. She stuck her whole face down in the watering tray this morning to drink. She is also acting mopey, cough/sneezing, and she had a coating of black slimy/solid film over her whole beak. She also keeps stretching her neck up and opens her mouth real wide right before she does a the cough/sneeze. I don't think it is just a cold. A few of my Barred Rocks have had that and they did not act like this.