Tiny the Wonder was an English Toy Terrier (Black & Tan) famous in the City of London in the mid-19th century for being able to kill 200 rats in an hour in the city’s rat-baiting pits. At the time, the world record for killing 100 rats was 5 minutes, 30 seconds, held by a bull and terrier named Billy.
Image credit: Jemmy Shaw, Public domain
Adapted from Wikipedia, CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Tiny_the_Wonder