One of my hens (six years old) named Violet has strange worm-like things wiggling around her vent. I'm pretty certain they're not mites or lice, and none of the descriptions of worms on the internet mention seeing them around the vent. They're small and whitish, and another hen has started pecking Violet's vent, so now the area is bare and red. She's not acting sick, either. We didn't find the little worms until today, but I think they might've been there for a week or so. I have no idea what's going on! Any advice would be really appreciated.