Dog breeds with shorter lifespans may discourage individuals who are looking for long-term commitments.
While there is some evidence that genetics have a role in determining lifespan,
the most significant contributor to shorter lifespans is disease, particularly cancer.
A detailed study that was conducted in 1999 found that the average lifetime due to natural causes was 12 years and eight months,
with only eight percent of the more than three thousand canines that were tested exceeding the age of fifteen years.
The "DDB" is a large canine companion that is content with moderate activity levels and is well-suited for apartment living.
These dogs are good watchdogs because of their protective nature and their bravery.