Who is the biggest dog?

It's impossible to say definitively which dog breed is the "biggest" because "biggest" can be interpreted in different ways:

* Tallest: The Great Dane is generally considered the tallest dog breed, reaching up to 32 inches tall.

* Heaviest: The English Mastiff is usually the heaviest breed, with males reaching up to 230 pounds.

* Longest: The Bloodhound is the longest dog breed, measuring around 3 feet from nose to tail.

Ultimately, the "biggest" dog depends on how you define "biggest"!