I probably would not bathe her anymore, unless you have to clean up her vent area. Penicillin might help, but you could also try Baytril (enrofloxacin) which can be purchased online. It is banned for chickens in the US, but as long as you are not using her for meat, you can give to treat E.coli and other bacteria. Antibiotics may initially help if their is infection, but it probably won't cure her. I will send you a link to read about dosage and where to buy it online.Should I try an antibiotic or penicillin in case she already has an infection brewing? Everything I've read about peritonitis is so grim I'm not sure what to do, however it's been four days so I know she's not egg bound. I'm pretty sure it's a soft egg or already broken egg in there, and yes she's always laid super thin shells when she does lay a normal egg. Poor girl. My other question : is the soaking in epsom salt bad for her if it is egg yolk peritonitis? I don't want to be doing anything to make her worse. Thanks so much!