15 Cool Facts About Bull Terriers By Allen Abby - Bull Terrier has an average lifespan of 10 to 15 years. Just like a German Shepherd, Bull Terrier likes to chase its own tail (this is a symptom of an obsessive-compulsive disorder). Bull terriers, with their distinctive faces and clownish disposition, are one of the most lovable breeds of the canine world. Please follow and like us: