Last Thursday we found our bantam rooster dead under the nest boxes. I was away at school but my family said that he was acting a little strange and lethargic the day before. two days later his favorite girl started acting weird, she was also lethargic, hardly moved all day then wanted to stay outside in the pen over night. The next day she came out to the feeder and didn't move all day, we moved her to a separate pen with food and water but she didn't touch it. She had dark green diarrhea earlier but stopped pooping eventually and finally died yesterday. just two days before she was acting just fine. The rest of our chickens seem to be doing just fine, but like I said it came on very quickly and by the time we noticed anything was wrong they stopped eating and drinking. We cleaned the coop and started giving them electrolytes and probiotics in their water. I have no idea what else I should treat them with we have Add to Duramycin 10 and Corid but this doesn't seem like anything we have dealt with before. Does anyone have any ideas on what it could be and how to treat them? I really don't want to lose anymore chickens!