The Spanish Mastiff is a giant dog whose size and history is fearsome but whose modern temperament is surprisingly domesticated. Centuries ago, this breed and other mastiffs were used by Spanish conquistadors to carry out gruesome tasks that included running in packs as shock troops for war (they even wore armor!) and eating the conquered enemies. Over time, they were led to be livestock guardians for cattle and other herds. These days, they are pretty darned good as companion dogs.
These dogs are very intelligent. As livestock guardians, they were relied on to deal with problems on their own. As domestic dogs, they need an alpha human who is calm and highly confident. A lack of training will quickly prompt a Spanish Mastiff to become stubborn and do what he wants, when he wants.
Because this breed is so big and they know it, these dogs don't bark much. Their loyalty and protectiveness, if unchecked by proper training, can lead them to be problematic. They are extremely loving, highly confident, and ready for action.
They may carry themselves regally, but these dogs are not fragile. They are used to being on the job at all times as well as on the move constantly. They need a lot of exercise to remain mentally and physically fit. There is plenty of Spanish Mastiff info available on-line and in books to help keep your dog happy!
