Hi, thought I'd let you know what's going on with my hen as the intial poster probably won't see this. I've been advised by a vet that it's almost certainly an abcess and I am doing twice-daily epsom salt poultices to encourage it to burst. 2 dessert spoons of salts in half a pint of warm water...
Hi, I know this is an old post now but can I ask what happened to your hen in the end? One of mine has exactly the same thing: an awfully swollen eye and head - on one side only with the other side perfectly normal. The eye is now completely covered by a white swelling. She is acting normally...