What is the worlds fastest rodent?

Answer 1

The worlds fastest rodent is certainly a "Venezuelan jet-black guinea pig". They run at speeds of 39-53 mph (63-77 kmh), they're a rare breed that many people,vets, and even scientists havent heard of, they're endemic to Venezula and have been known to outrun greyhounds,whippets, and even young cheetahs, as they're abrupt paws can turn 0.18 seconds faster than a hare. Sources: Rodent Velocity Expert