Got 3 RIR hens tonight along with 4 Khaki Campbells. All of them appear in good health, i checked for mites on the hens and didn't find any, no scaley leg mites either. I found a bulging vent on one of the hens and i could see some poo in the vent. All three of the hens have dirty bottoms but the vents looked good on the other 2. My plan tomorrow is to bring in the hen with the bulging vent and bath her, add some apple cider vinegar to their water and im not sure what else i should do. I don't have a photo as these girls came in late tonite and i had to set up a temporary holding pen. I have had chickens for years and always take them in when people have to get rid of them but ive never dealt with a bulging vent. The previous owner said "oh that chicken lays 3 eggs a day thats why her butt looks like that, she's sore". Crazyfeathers shakes her head.... All of the hens have good weight and combs are nice and red. The one with the vent issue does not appear to be in distress as she ate and drank well tonite. Ideas please. Thanks