My mother in law left her dog here....Does anyone know of?

they stayed with us for two months. They night flighted along with some tools and a ring of mine and I woke up to find that she had left her pit bull choke chained to our garage door. Sweet, huh? We have two dogs already, not to mention two small children. The dog is sweet and all, but my m-i-l left her the wrong way. Does anyone know of a pit bull rescue or sanctuary? Or even a nonfighting breeder that would want her? Like I said, she's got a good disposition despite how she was treated, but still upsets the balance. Thanks in advance..