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 pit bull that barged into her home Wednesday and headed for her 3-year-old girl.

Rodrigues says the pit pull sank his teeth into Fluffy's black-and-white back and dragged out into the street, where the two continued fighting.

Rodrigues says she and neighbors threw rocks and pieces of wood trying to break up the canines, but nothing worked -- until a car came along and slammed into the pit bull.

The pit bull's owner took both dogs to the vet. Both survived.