We moved into a house several years ago and the neighbor behind us had a Rottweiler that was an outside dog. It would go nuts whenever it saw us in the back yard. My wife was afraid to go out in the yard, so she had me build a privacy fence. Every afternoon I would fill my pocket with dog bones and go out to work on the fence. I fed the dog bones. Within three or four days the dog would meet me at the fence with her tail wagging. She was a really sweet dog that was just doing what she was supposed to do.
That's 'zactly what I've done with the dogs in the yard behind me (one a pit). All the dogs are now just one big happy pack.