I need a dog

I've been thinking about this for a long time. What is the perfect dog for a homestead? A dog should be a great companion, handle livestock, and defend against interlopers. On the security front, a dog or pair of dogs should be able to handle other dogs & coyotes, four legged garden pests (deer) and unfriendly two-legs who wander by. A good dog should keep the honest neigbor honest & the suspicious-looking visitor fearful. After much thought, my choice is... the Blue Heeler. It has a long history as a livestock dog. Its outback lineage, with Dingo ancestry, make it a tough customer on the security and basic survival fronts.