12 months ago 12 months ago Mastiffs are dominant, so it is not recommended to have a dog of this breed for an amateur dog breeder. (14/14) by Heather Vance 12 months ago12 months ago Facebook Twitter Credit Heather Vance 12 months ago 0 Previous 14/14 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 Facebook Twitter 0 Comments Cancel replyYour email address will not be published.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.