My wife and I recently bought a boerboel do go argentino great Dane kangal hybrid ( over 60% boerboel) about 3 weeks ago while I was at work (graveyard shift) some teenage boys tried coming through the front door at 1 in the morning while my wife and girls were asleep. Our then 4 month old pup was so hell-bent on getting at the trespassers while growling and barking that my wife thought he was going to tear up the door! He is always very loving around us so it was reassuring to know that my family is safe while I'm at work.