My barred rock, 4 year old hen, Eleanor, has a mystery ailment and I'm hoping someone out there can help. A few days ago I noticed her limping and thought she'd pulled a muscle. I checked her legs. Fine. Then I noticed that the skin below her vent was bright red, hot and swollen. I did an internal check (vaseline on a finger and wiggled it around in there.) Didn't detect any internal injury, nor a stuck egg. She doesn't have lice or mites. Her diet is the same as all the other hens who are fine. She's eating. Some poops, but not big healthy ones. I gave her a good warm soak in an epsom salt bath. Poured some olive oil down her throat. Am giving her baytril (a powerful antibiotic.) Have her isolated. Two days later, no change in her behavior (she's bright-eyed, but moving with discomfort) or symptoms. (I've got photos, would someone clue me in on how to post jpgs here?) Thanks in advance for your help!