The feathers around one of my chicken's vent always seem to have dried stuff on them, and don't clean up very well or stay clean very long with water alone. Lately they've been damp as well as messy - Not sure if that's related to the hot weather and drinking a lot. It does seem to have a slight odor to it when wet. Am I right in thinking this is abnormal? If so, is a fecal check the best way to get a diagnosis? I'm wanting to check if my instincts are correct, since my family seem to think she's normal and I'm being silly to pursue this, but I'm not so sure.