Hi, I'm having an issue with my flock. I have lost 2 hens in the past few weeks, would have been 3 but the fox got her! I have one additional sick hen. They all have had diarrhea, lethargy and ruffed up feathers and hunched appearance. No respiratory s/s. I have treated them with Corid for Cocci, but no improvement. Currently I have a flock of 15 and none of the others have symptoms and their droppings are normal. I also have 16 2-3 week old chicks with no issues. Any advice would be appreciated.