I have a 3 1/2 year old buff orpington female that looked "off" this AM. Her name is Biscuit. I am accused of spending too much time with my chickens BUT normally if something isn't right, I notice fairly quickly. Anyway, I let them out in their tractor this AM and noticed that she was walking around, pretending to scratch around but really wasn't...if that makes sense. Her comb is more "floppy" than normal and the tips are a little purplish. After I put the other girls in the run, I picked her up to give her a check and as soon as I lifted her, a ton of yellowish, brown liquid came out of her beak. It was a lot and I didn't have to do anything to get it to come out. Does this sound like sour crop or could it be something else? She does not have diarrhea or respiratory symptoms. I did have one pass away last year after a very brief illness but otherwise, they have always been healthy. The eat Purina layer pellets, have clean water and have access to oyster shell. Any advice is appreciated.