I have a 24 week old Rhode Island Red that has ruffled looking feather. She eats, drinks, acts totally fine. She makes a quiet shrill noise often, which I take as being content. I have checked her vent. No sign of mites or lice. They have actually only ever been outside once when they were 10 weeks old. The weather turned cold, and my husband didn't get the coop built in time, so they live in a coop in the garage. I highly doubt they have mites, lice, worms ect. Is it bad that her feathers look so ruffled?