A good guard dog keeps the bad guys away. So this seems misplaced: “to bark minimally”.
If the Dobes hear someone outside, they’ll bark to warn them to not come inside.
If they catch someone outside, the creep will never hear them coming.
It’s just how they’re built.
Depends on the breed.
There’s alert dogs, alarm dogs and then there’s dogs like Dobes.
Depends on your desired outcome.
Macy’s used to turn loose a pack of Dobes in their store overnight.
They were never robbed, during that time.
http://www.nydailynews.com/retail-wags-dogs-dobermans-guard-macy-hours-article-1.800119
http://hundesportverein.com/nightwatch.pdf