What is the biggest bread of Dog?

• Stephanie Book Posted : 4/20/2006 7:18:11 PM I don't have any facts, but I am pretty sure there was a St. Bernard that weighed at least 300 lbs. That being the world's heaviest (or biggest) dog. It's probably been a couple years since I read that, though. 0 LIKE Like Share You have posted to a forum that requires a moderator to approve posts before they are publicly available. Hey, it's way more fun when you sign up or log in Connect With Connect With Sign Up Login