On of my 2 year old hens was not acting herself the other night-- lethargic and poofy, and her rear/vent was covered in diarrhea (the vent was not pasted though). Her crop was swollen and gurgly and I figured it was sour crop. I cleared out her crop, kept her isolated for 2 days with only ACV and yoghurt with a little oats mixed in. The crop went down and she seems okay except the diarrhea is still there, and her appetite is not back to normal. THEN, I noticed one of my year old Barred Rocks has the same issue with diarrhea-- her back end is covered with it. Her crop looks normal but I'll keep an eye on it. Does anybody have any idea what this could be? I'd really appreciate any advice. I've read through my Chicken Health Handbook and have done a search here, but I'm still at a loss. ..