A friendly, floppy-eared mutt named Fluffy may have earned himself a new nickname in his Brazilian hometown: Ferocious-When-Necessary. Kenya Suelen Rodrigues of the city of Campo Grande is quoted by the G1 news website as saying the normally playful and friendly dog immediately attacked a pitbull that barged into her home and headed for her three-year-old daughter. Ms Rodrigues said the pitbull sank his teeth into Fluffy\'s black-and-white back and dragged him out into the street, where the two continued fighting. She said she and neighbours threw rocks and pieces of wood trying to break up the canines, but nothing worked - until a car came along and slammed into the pitbull. The pitbull\'s owner took both dogs to the vet. Both survived.