How do you treat a chicken with a broken thigh?

To treat a chicken with a broken thigh, first isolate the bird to minimize movement and stress. Clean the wound if it's open, using a saline solution, and apply an antibiotic ointment. Immobilize the leg using a splint or soft bandage, ensuring it doesn't constrict blood flow. Provide supportive care, including a quiet environment, proper nutrition, and hydration, while monitoring for signs of infection or distress.