One of my 4+mo old Golden Wyandottes came out of the coop this morning with an ear area that's the size of a large marble. There's a small blood speck in the middle of it. It's quite swollen! She does not scratch it nor does she seem to be ill affected by it, though I caught her sleeping standing up out in the open which is rare, usually they huddle up somewhere. I can touch it, and she does not flinch. No other bird has this. Anyone have any ideas? Bug bite or some infection? What next? She's a nice girl, very mild mannered.