Can anyone help. I have 16 3 week old leghorn chicks and one is very unwell today. The chick is listless and fluffed up a bit. When I picked it up its crop was squishy and it freely vommited a murky looking fluid. I massaged the crop and it vomitted freely until the crop felt empty. My question is, is this sour crop, if so have I done the right thing, what causes it, and what else can I do. The chick still looks unwell. Worried.