A few summers ago, I was a manager of a convenience store my father in law owned. Out back, we had a "watchdog" to protect the back door. He was a German Shepherd, but must of had something else in him. The reason I say that is because he was Jet black, and ---smurfing--- HUGE! I am about 6 feet tall, and he could drape his front legs around my shoulders. I am now thinking he might have been a wolf hybrid. The funny thing though is that he was the friendliest dog I've ever had ( I claimed him and took care of him). When I first met him, I was very leery of him. His bark was pretty intimidating, and of course his size was too.After getting to know him I was sitting out there with him, brushing out his coat and playing fetch.
Still, one time he busted his industrial size chain. He was just loping around dragging about 50 lbs of chain without a care in the world. While I was holding him so my father in law could repair his chain, he did something that spooked me pretty good. After struggling against his collar for a few minutes, he turned and looked me straight in the eye, then jerked right out of his collar and took off. Right then, I saw in his eyes that I didn't mean ---steaming pile of meadow muffin---, and he was gonna do whatever he wanted. I didn't realize it at first, but now I realize that if he eventually decided he didn't want me messing with him, all that I had done for him up till then wouldn't mean diddly squat.
I left at the end of the summer, and he bit a woman a few months later after he had gotten loose again.