thanks brazilliandogge one more test you should do(just my opinion) try fighting the puppy(turning him on his back and do like trying to kill him grabing him in te neck and shaking). this will show what the dog will do as adult when cornered or too much stress is applied by a BURGLAR/INTRUDER/HELPER. NO BURGLAR IS GOING TO BE SOFT ON YOUR DOG.every puppy will gget aggressive in this situation but the time laps between when the aggression shows will differ. this MIGHT SHOW THE TIME IT TAKES FOR THIS DOG AS AN ADULT TO RECOGNISE A THREAT AND REACT TO IT. just my opinion btw your tests are almost right (imo) except for the part where the pup has to come up and befriend the stanger. i would like a dog that recognise his own family even as a puppy. sometimes not warming up does not add up to a fear biter but the other way round, a real defensive and LOYAL GUARD DOG thanks again waiting for your response and anybody else responses regards troy