I noticed this afternoon one of my hens was puffed up while all the other hens were not. I went and picked her up and noticed that one of her waddles was swollen and had a black spot on it. However when I went to flip her to immobilize her and inspect her further I found her vent covered in poo and had a horrible smell about it. I immediately went upstairs and gave her a 30 iodine soak and cleaned the mess off around the area. While trying to find out what the issue is via the internet I noticed a lot of the fly strike images look a lot like what her vent area looks like yet I do not see any larvae. The tissue is hard and swollen (more specifically to the right of her actual vent) and is incredibly uncomfortable to her. She appears to have some blood coming from her vent as well after I finished washing her. I have separated her from the flock and have her in an area with penicillin in her water. I am not sure what to do at this point. Do I investigate and poke and prod further? Attempt to bathe her each day to see if it gets better?