Love those ambulls! I have a rottwieler that is a wonderful companion and an al round great dog. She also loves guns and gets excited when I pull the long guns out of the safe because she knows we're going some where.
The thing owning a large dog with an unfounded reputation has taught me is that a dog is an amazing visual detterant. I could tell a few tales of agressive people having an instant attitude adjustment when my pup appeared on the scene. Even the agressive panhandling bums avoid my open top vehicle when she is a passenger and they give a wider berth when I walk her. I think there is something instictual that makes people very afraid of being eating by a large canine.
Anything that serves as a barrier between me and the need to use a firearm in preservation of self or loved ones is a good thing. This is one of the reasons I will always like to own a large wel trained dog.
That said dogs are not for everyone, paricularly lare dogs. A dog is a long term 10+ years commitment. A dog needs training lots of it, particularly a dog large enough to deter those with malicious intent, and particularly a dog large enough to actually intervine on ones behalf and with a nature that predisposes it to do so. A dog needs daily excersise and attention. A dog needs food and veterinarian care. A dog in short is high maintence.
In short dogs are great but some people would be much better off with a home alarm system. If you are going to have a big dog training is crucial as is soicialization and ensuring thedog has a solid temperment. I have a friend with a malinois that must be crated if someone is over, I always wonder how much protection a crated dog is. My rott lays quitely where I tell her when I have guests such as a repairman or simply my friends. When I open the door she stands where I have taught her, so she is the first thing someone on the otherside of the door sees and it swings open.
but if someone actually came into my house i'd be scared of shooting the dogs instead of the bad guy!
Training training traing. Work on their recall. If that is rock solid you can call them out of the way.