I woke up yesterday to find our 15 month old hen had died. We have 3 hens and 6 (23 week old) pullets in a coop together. Our Jersey hen had been acting strange the day before but was eating and drinking fine, but was very slightly lethargic. I opened coop and did find almost flourescent green poo yesterday after searching for her cause of death. She had not laid in almost 14 days (but was NOT egg bound). My other two hens have not laid for three days. They have never been wormed and we live in Ohio where the temps are down and the days are slightly shorter, but any idea what is going on? If I do not "see" worms should I still go ahead and treat? No lice or mites they have been checked very well and no signs of ANYTHING respiratory. All remaining flock eating and drinking fine.