I am LOSING the chicken health game this week-- two URIs, possible scaly leg mites, and now a hen with sour crop. Her crop is massive and smells awful; last night I tried to empty it a bit by holding her upside down and stroking her throat. She vomited quite a bit, but far from everything; I could also hear the gases created by the fermentation bubbling away. I've currently got her house separately with no food, lots of water, and grit, but is there anything more I can do? I've seen suggestions of an antifungal, but what OTC version could I use? This is my first go-round with sour crop!