Hen with infected vent?
Yes chickens actually enjoy a warm soak once they get over the excitement of being picked up. She has a prolapse of her vent (or cloaca actually.) The longer the insides stay out, the harder it is to get them pushed back inside. This happens sometimes with an egg getting stuck, and may happen again. Each time she poops or lays an egg, she may prolapse again until it heals. Also, there can be necrotic or dead tissue there if you see any blackish skin. Some people recommend honey to shrink things, some recommend extra strength PreparationH. Here is some info: http://www.the-chicken-chick.com/2012/04/prolapse-vent-causes-treatment-graphic.html
I've dealt with a couple bad butts lately. There is a possibility that there is some related issue, so do a little investigation.
The birds do seem to respond well to a soak in warm water. I like to put some epsom salts in the water and change the water in the middle of the bath. I think gently massaging and cleaning the area also helps.
I wear disposable gloves when cleaning the bird and especially wear clean disposable gloves if I'm correcting a prolapse or probing inside the vent.
Second, if I'm going to probe inside the hen, I use water-based lubricant. They sell this lots of places, but make sure to get the plain kind. As scary as it was the first time, I once found a quantity of soft egg shell inside one of my special hens. The poor dear had been working so hard to expel the soft shell that she'd prolapsed her vent. It took more than one "sweep" to find the stash of broken shell, but once I got it out I could see instant relief in the poor dear. I now know to keep an eye on her bum.
Using PreparationH does seem to help shrink the swelling in the area and bring the bird some relief.
If the backside of the hen smells funny or her poo is especially nasty, there may be an infection. If the infection is a fungus, then treating the area with an anti-fungal like athletes foot cream should quickly clear it up. That's where I would start because using an antibiotic would make a fungus infection worse -- so I wouldn't use anti-bacterial creams just in case.
That said, some infections are bacterial and those *are* treated with antibiotics.
upon closer inspection, her vent is not as easily seen compared to the others, but it's not prolapsed as I can see it and I even used some lubricant to slide my finger inside and feel around. She doesn't seem to be in pain, but as you can see, she's molting as well and doesn't look well. She isn't eating and is much thinner than usual.
That bulge is located under her belly on the way up to the vent. It doesn't feel like a hard egg, more like one of those gel stress balls. Slightly hard in the middle but squishy all around. I've tried manipulating it up to her vent assuming it's stuck poop but nothing. I may not have been hard enough but I don't want to force anything since I'm still not sure what it is.
She's soaking in epsom salt now and trying to get her to eat some oatmeal with olive oil to lubricate her insides.
Mineral oil is a much better way to lubricate intestines, olive oil gets digested, mineral oil does not.