I recently bought a Rhode Island Red pullet for a petting farm. I bought her from a large container of other chickens at an animal auction. You can tell she was kept in a cramped space with other chickens because she is covered in poop. When I first brought her home, I noticed her purr sounded kind of gurgely. I later noticed liquid coming from her nostrils that she frequently wipes off on straw. She also does a sneeze/cough sound occasionally. She is still quarantined from the other chickens. She eats, drinks, and moves around fine. What's wrong with her? Can I treat it? Would other chickens be safe around her?