This bird wandered into our backyard in the city. At first we thought one of our girls got out and got attacked then realized it's a naked neck.. After trying for a week we finally caught it. I currently have it quarantined from my main flock in a dog kennel. I've had my nine birds since they were chicks and they're all comparable size. Mine were all vaccinated for mareks and coccidosis. If this hen isn't claimed, what do I need to know about introducing it to my flock or anything I should be worried about?