By DEAN SCHABNER July 27, 2005 -- For Sonya Dias, when the choice came down to leaving the city she loved and the Victorian home she had painstakingly restored or giving up her dog, there was no contest. Her house is on the market and her bags are packed, because Denver says she cannot keep her beloved pet, a pit bull named Gryffindor. After several high-profile pit bull attacks, the city enacted a law banning the breed, but Dias insists concern about her pet is unwarranted.