[Migraine]

These dogs were bred to hunt bears or lions or some damn thing. What the hell is it doing in someone’s yard? Dogs that have jobs are a wonder to behold. Dogs with no job are trouble.

[LongElegantLegs]

They were bred to catch (human) poachers and hold them without damaging them, actually.

[El Laton Caliente]

They were breed as family guard dogs and the normal temperament is to be very gentle and protective with children... This is out of character for the breed...

http://www.dogbreedinfo.com/bullmastiff.htm