one of our hens died about 1 month ago and we think it was a combination of sour crop and cocci, another one of out hens (claw) has now got what we think is sour crop (this afternoon her crop is empty and the little that is in it is squishy and pressurized felling). her vent is also messy, would this be sour crop? this time we got her early. Any thought to what it might be? Answer's appreciated.