Hi: I have a female Australorp, about 18 months old, who is very sick. She has diarrhea, is very thin, barely eating and drinking, lethargic, and a slow heart rate. She is also not able to stand well. It seems like her legs (left especially) are not working right? I have tried everything I know yesterday and today, but she doesn't seem to be getting any better. I finally found a couple of poultry vets nearby, but neither was open today. I am headed to one of them tomorrow. Does anyone have an idea of what might be wrong? And if so, any advice? I am super stressed about this sweet girl. Thanks for your help.