I am new to chick raising. My 15 girls are 7 months old, laying and happy. They have a walk in coop with plenty of room and have a large free range area. I just noticed today, one of my girls has a red lump on her right side of her neck just below the ear area. Any ideas??? I have been searching all of the illness and disorders bur can't find anything. No coughing, sneezing, or other problems. Eyes are bright, eating and drinking.