That is what I have been doing. I suspect cannibalism may have led to the situation, although she was not spending the night with the other hens, and they are free ranging during the day, except this hen, now. I suspect gangrene. If she starts to be in terrible pain and this drags on, I will...
could be. It is egg sized. Looks for all the world like a pus covered egg trying to break through the hen's belly. I just soaked her in salt water again and sprayed with a livestock insecticide and an anti bacterial. She is surprisingly lively. Hard to get a photo while holding her upside...