I'm chicken-sitting my neighbor's mini-flock and when I went over tonight to check on them, I actually witnessed one of them vomiting. I've only been a chicken owner for a year, but I've never seen something like that before. She hurled a clear liquid as far as I could tell. Have you ever seen something like that and if so, why would that happen? Oh, and for the record: EWWWWWWWWW!