Hi BYC peeps, I have a sick Australorp. She is about 5 years old. A few days ago she was walking and all of a sudden her tail would drop. Then she was having issues walking in general. She was sitting very fluffed up. Now two days later she is laying on her side. I have her quarantined now from the other two. I have not seen any worms or lice or mites. However there has been some diarrhea looking poops here and there. Her comb is still red but she is not drinking or eating. I gave her greek yogurt. She only pecked at it once. I have never done any deworming treatments. There were lots of old fruit droppings from the fruit tree. I do not think she is egg bound. The others seem fine but one has lost weight and feathers look disheveled. So those have been concerns too. Water container has been a concern too. They just don't seem to drink much water. So could be stale water? I don't know what to do and to be honest. I would like to try and figure this out before trying to pay several hundred dollars to a vet. Any in put would be helpful. I am going to give her a bath soon. Any words of advice? Here is a photo of her above the area near the vent.