I lost a chicken yesterday.She puffed up the day before and was looking bad. I put her in the coop with water and food and by the end of the day she wasn't moving and had her head under her wing.Yesterday morning when I went out she was barely breathing and had fluid running from her beak. She died about an hour later. I've been watching my other 13 to make sure their alright since I have no clue what was wrong with her and so far they seem to be fine.