I have a hen that was attacked by another hen/hens and they pecked her head bloody and looks as if they tried to peck out her eyes. All the scabs have fallen off but her eyes are still swollen shut and there's an infection in both of them because they're VERY swollen and now pus in forming in them. The hen I suspect of doing this did it to another hen but I nursed her back to health. Needless to say, I've gotten rid of the culprit, which by the way was an Aseel. Obviously I need to let the pus out so the healing process can begin but I'm a little shaky on how to do it. Please help!