Name: Lucky (she doesn't answer to her real name anymore)
She has developed wolf ears and a bushy wolf tail. She has also grown fur on her forearms and legs, and her hands and feat have developed sharp claws.
Lucky has it bad, as far as the mutations go. Not only has she progressed well beyond just the ears and tail that all the girls have developed, but her mental state has become much closer to animalistic as well. She can only remember and utter single words and the shortest of phrases with which to communicate with others. She doesn't seem to be willing to dress herself, but if someone helps her into clothing, she will remain dressed for a while before she gets agitated and rips them off. Her libido has also increased to the point where she is regularly in heat, and the intervals seem to be getting shorter as time goes on.
Cassandra Sandoval loved to swim. Her family lived very close where the ranch is now located, where ? was doing their experiments and polluting the nearby water supply. She would swim in the nearly lake almost every day since she was a little girl, having no idea what kind of toxins to which she was exposing herself.
It built up slowly at first, then the mental and hormonal changes started to accelerate during her senior year of high school. When her parents caught her one night with two boys in her bedroom, all three of them going at it like animals, they were of course very concerned, but still had no idea just how much their daughter was changing. Then came the lapses in concentration, then she started having trouble with what should have been really simple tasks such as dressing herself, then after all that started the physical changes.
When Cassie's parents realized she was actually mutating, they took her to a doctor for treatment, and ended up committing her to an in patient program. With no idea what was really going on, they have unknowingly left her to live in seclusion with others like her. Now the only family she has are the other girls at the ranch.
Boys: Yes, I would be interested in having Lucky interact with the male visitors.