Just to tag a little onto what Tatutoro posted...
Well, now, this is a man's hobby.
This guy likes to do nothing more than hunt bears in West Russia with only a bow and arrow and a bunch of big dogs called
filas.
Apparently, your average fila mastiff is well up for this, coming as it does from a heritage of 400 years of specialist breeding in Brazil. In fact, the fila is known as "the national dog of Brazil" where it is used to hunt jaguars and wild boar. Now that is cool, and by cool, I mean totally sweet.
Think about it. It's a known fact that when you live in Birmingham, you're never more than 3,500 miles from the nearest jaguar. A jaguar can be into your garden, eat your daughter and be out again before you've finished your cup of tea.
But not if you have a 215lb Brazilian personal protection dog living in your shed!
This site also contains an informative but distressing article roughly entitled 'Tosas vs Pit Bulls: Who kicks the most ass?' Apparently, in one study, after fighting it out, Tosas win 90% of the time, particularly if they come from 'the finest fighting bloodlines in East Japan'.
And if you think this is fucked up, that french woman who had the face transplant had her face bitten off by a labrador! A labrador for pity's sake. Don't risk your family's future, invest today in a dog the size of a small pony.