I have an Easter Egger that has developed a large and what seems to be a liquid filled cyst just above her breast at the base of her neck. I'm sure what it is? My first insincere is to drain it, but I definitely don't want to make it worse. It's been there about a week and a half. It doesn't seem to be affecting her at all. She's still active, eating and drinking, foraging etc. Any ideas on what it could be and what I should do?