Gustav, Mastiffs don't really require that much room. They're the ultimate sofa 'taters, especially an Olde English. The Bulls and more esoteric breeds require a bit more exercise and stimulation, but an Olde English is a lovely, slothful wretch that actually needs to be encouraged to exercise. It is important that you get them out to exercise; those big hearts and muscles need good conditioning to be healthy, but it's not like exercising a Lab.
Barb - I was really glad when I saw that they had added the specifc Fila TT. It's very different from the standard Temperament Tests, lol! At this point in her life, Shiva would flunk spectacularly I'm afraid. But I think Kharma would pass with flying colors . . .