We recently lost one of our Buckeye hens to what we think was sour crop. Sent was listless, and wasn't eating. Her crop was large and squishy, and didn't empty over night. I isolated her, gave her probiotic, and treated her with miconazoleas someone on here had suggested. Within 3 days she was dead. I asked my husband to do a post mortem on her to be sure that it was sour crop and nothing that might affect our other hens. He found that her crop had wet chicken pellets and whole oats in it. It was foul smelling. (While checking her butt when she was alive, a large amount of sour smelling liquid ran out of her mouth, which made me wary of sour crop) He also found a huge fatty mass in her abdomen. It was approximately the size of two large bagels. One for each side of the mass. He is a bird hunter, and said that he has never seen anything like it before, but she was a hen that liked to eat grains. I will post pictures below. CAUTION!GORY PHOTOS BELOW!