In July last year, my ferret, Carly, started losing her beautiful brown fur. She was moved to a room with more light and it got worse! I also noticed that her vulva was swelling. When I did research, she had shown some symptoms of adrenal tumors or adrenal disease. She was moved into a darker room and her fur came back along with her normal vulva size. A person I know did research on her symptoms. They said something about 'photo dysplasia'. Because I cannot find anything on photo dysplasia, I'm confused. What did (or does) my little Carly have? She is 3 or 4 years old and she has been spayed. She did not act sickly in any way when she was bald (except on her face) and her vulva was enlarged. In the room she was in before all of this started, the light started increasing just so I could see my computer keyboard.