I discovered a strange wound a little smaller than silver dollar on the middle of a hen's back, it's yellow & gelatinous-looking and smells pretty rank. I don't know when or how she was injured, I see no obvious cut or evidence of blood, it's just a broad, flat gooey-looking area that the feathers have all sloughed off from. I found it earlier today; she seemed fine on Thursday, but stopped eating yesterday and has been almost completely inert since then; did eat a little yogurt and been drinking a bit on her own today. (Also, just ate a bit of boiled egg right before I posted this!) What I've done: Brought her inside, put her in a box of litter under a heat lamp. (We're in Florida though, not sure it's necessary?) Cut feathers away to expose the area, rinsed with warm water and hydrogen peroxide (didn't fizz at all), applied triple antibiotic ointment. Crushed aspirin into her water for pain relief, have yogurt & boiled egg standing by in a dish. She's barely moved at all since I brought her in, has little interest in eating, but does seem alert and drinks when offered water. Questions: - Any insight into what I'm looking at, or what could've caused it? - What else can I do for her? Should I attempt to scrape off the goop from the area? Should I get something better than hydrogen peroxide for rinsing, like betadine or saline? The only antibiotic I have on hand is Tylan 50, does that have application in a case like this? - Is this wound alone enough to cause her to stop eating & moving? From discomfort/pain/general distress? Could there be something else going on that I should be checking for? Appreciate any insight and input from you long-time chicken people. I've been reading BYC for a while now without participating, sorry to make my first post here a blatant plea for advice. Thanks all! Other info in case it's useful: She's about 10 months old, no other health issues 'til now, has been laying well. Dusted the flock for mites about 1-2 months ago, just finished a course of Safeguard dewormer a few days ago. Everyone else seems fine.