I have had so many over the years, A Doberman for sure DD (Dober Dog, Dam Dog etc) was loyal to a fault knew the yard, knew exactly how far a squirrel could get from a tree. Golden Retriever loving to the end and still a puppy at 12+. Current dog is about the best one I've had, a BRT Black Russian Terrier not what you think, look one up on the web. Obedient loyal and I would not want to be the one who breaks into the house. Funny thing about them is they have little prey drive, they do not chase things, they wait until it crosses the line. If it moves off then no issue, The warning barks get louder and deeper as something approaches. At 90+ pounds my runt Layla is still rather impressive.
