My children noticed this evening that our 4 year old female pekin duck has a hugely swollen cloaca. (I think) It basically looks like a very swollen, red (and bleeding some) donut. She doesn't seem to be in any pain, so we brought her in and she had a bath. I'm planning on putting some prep h on it, but once the swelling goes down, doesn't really seem to be anything to put back in. There's just a lot of swelling. (Unless I'm missing something somewhere) Suggestions? Does she need antibiotics? If so, what, how and where? Thanks for any help!