I have a 15 week old pullet that I am just stumped about. She started 'throwing up' if you want to call it that yesterday. Liquid will come back out of her beak sometimes when her head is down. The crop is liquid filled and feels like a balloon. It is not hard so I'm thinking sour crop. I did drain her crop yesterday and there is no bad smell which comes with a sour crop. The liquid has a sweet smell which just reminds me of the starter/grower feed. When I drained her crop or she throws up its a light tan in color and some of the feed also comes with it. What else could it be? I have her separated from my chickens and gave her ACV along with some Krill oil last night. This morning the crop was down. Dumb me did give her some feed mixed with water this morning, Not much mind you. Tonight the crop is large again and I thought it strange the feathers around the crop felt wet. I examined her and didn't see anything else wrong. Her feathers have now dried off.