My chicken (A buff orpington somewhere around 4-5 years old) seems to be sick. She can barely stand and when she walks she tips over alot and has to use her wings for balance. A few years ago (Roughly three) she had a bad case of bumblefoot in one of her legs. After picking at it and using some medicine it went away but it had been so bad she couldnt use that foot very well but still limped along. But now her walking and balance isn't good at all. Her crop is empty and she hasn't been eating much. As far as i know she didnt have chicky breakfast and we hadnt fed them yet. This evening (now) she picked at some food and popcorn (No butter no salt) i gave her. She then proceeding to go over by some empty barrels we use for barrel-racing practice for the horses and layed down. Then she eliminated but her poop didn't look right. It was very watery and green. Shes been acting strange (i.e laying down alot. not eating much) but this is the first time shes shown these symptoms. Please help she is a dear member of the flock and family!