9 months ago 9 months ago The breed is believed to have evolved from the Mastiff, giving the dog the combination of strength, courage and agility for which they are best known. (1/14) by Heather Vance 9 months ago9 months ago Facebook Twitter Credit Heather Vance 9 months ago 0 Previous 1/14 Next View full list Like it? Share with your friends! Facebook Twitter 0 Comments Cancel replyYour email address will not be published. Required fields are marked * Save my name, email, and website in this browser for the next time I comment.