Conversation so far:
what type of breed is an american bulldog
The American Bulldog is a large, stocky and powerful working dog breed from the Mastiff family. They have distinctive half-erect pendant-shaped ears and a strong jaw.
what is the american bulldog descended from
The American Bulldog is a large breed of utility dog descended from the now-extinct Old English Bulldog.

Question: how long does the breed live
Self-contained rewrite: how long does american bulldog live