Originally I had brought back a chicken from the fair and she seemed fine. A few days later she was floppy and could hardly walk and later, she kept falling over and wasn't able to get up. Now, two weeks later she's fine again. However, I have two other birds now that are sick, they seem to be much worse. These two are about one and a half year old buff Orpingtons (rooster and a hen), they were in very good shape before all this. So basically, they can't stand at all by themselves. If I pick up the rooster and set him down, he instantly crashes to the soil. The hen on the other hand, she'll walk but very, very unbalanced. Today the rooster got up (with my help) and walked like he was drunk for a few seconds before falling beside the water dish. This is been going on for a few days now. I've isolated them from the flock. Lately our water has been taken from our neighbours because our pipes had to be redone. Their water smells like sulfur, but it's all we have to use. Also, one day I realized a perfectly good bag of food had mold in it, that was about a week ago. The chickens also found some food scattered outside that was soggy. So really, I don't know. I'm hoping these two Orpingtons will get better, since my Brahma did from (seemingly) the same thing. Any ideas, guys?