One of my hens, Feather, has a lump on the right side of her head...behind the eye...where the "ear" is. I felt it today, and it does not appear to be painful to her, but it is solid...like a cyst. She does get pecked there a lot by her sisters. It is not red, it is not hot...it's a lump about 1/4" tall and between a dime to a nickel in width. Any ideas? I'm strapped for money this month...so, unless it's an emergency, I'd like the vet to be the last option.