Sorry for your loss, I too have a Pitbull and a Great Dane. They are house dogs and are only let out in the yard to use the toilet. I walk them each evening a good few km leashed around my moo baan.

The Pitbull has never barked at a person before and super friendly, the Great Dane is possibly the dumbest most clumsy dog I've ever owned but got a huge huge bark that's likely to deter anyone that comes up to my gate (well that and she's the size of a small horse).