II have just lost an Aylesbury duck to sour crop. i took her to the vet, but she was already very dehydrated and despite meds, and my best efforts, she died. I feel she would have had a better chance if I had caught it earlier. I noticed that she was a bit moth eaten in the tips of her wing feathers, but did not think she was unwell. Does anyone have any ideas of early warning signs for sour crop? I hope to avoid it in the future, and I do observe my ducks when i let them out to make sure all are eating etc. All help greatly appreciated.