What are top fighting dogs?

Although there are many breeds of dogs used

for fighting worldwide, including the Fila Brasileiro, Dogo

Argentino, the Tosa Inu & the Presa Canario, the dog of choice

for fighting in America is the American Pit Bull Terrier.

Occasionally other breeds & mixes are reportedly used in street

fights or as "bait" dogs used by some to train fighting dogs.