I'm not sure what the cause is, either, but I did lose a hen a couple of weeks ago to salpingitis. I've tried some basic things, like giving milk kefir in hopes of balancing out their gut flora, but it seems like it's not just a gut flora issue. I've added ACV to their water, but I just discovered that I'm probably not putting enough in their 3 gallon waterer (I was only putting 2 tbsp). I'm considering putting some oregano oil (in a carrier oil) in their water as a natural antibiotic, but I'm leery because it's a pretty volatile oil and I'd hate to make a mistake and cause my girls to burn their mouths on the oil. I have had chickens for a few years, but just in the past year I've started having issues and I honestly don't know how to figure out what could be wrong. I have some sulmet from 3-4 years ago (it's probably expired) if I need to start something today. I could get other antibiotics this week to help if I need to. Our feed stores around here are closed on Sundays. A little more info, only one of my chickens (Carlota) is laying, and she is one that has diarrhea, but her eggs are nice and clean, so I'm guessing that it's not as bad but I have no real idea. Ethel keeps sitting in the nesting box, but never lays (could she be egg bound? Does that cause diarrhea?). My Carolyne has a pretty bad case of diarrhea, I'd say the worst of the 3. My 4th girl, Mrs. Trumble, isn't having diarrhea, but isn't laying, and she's been my best layer in the last year. It feels like I'm dealing with all different issues with all 4, so I'm kind of overwhelmed. If one of you kind experts could hold my hand so I could learn how to troubleshoot my girls' issues, that would be so great. Thanks so much.