Our guy is "Tank".  A red dobe/germ shep/catahoula mix and he is the king and he knows it!  LOL  Actually he's a 100 lb lap dog!  LOL  But I saw him in action one day!  I was inside the front screen door and he couldn't see me clearly just my shadow.   The hair from his neck all the way to his tail was straight up, his ears were back and his head down with his green/yellow eyes glaring at me as he stalked up to the door, his posture obviously ready to pounce and attack!   He was a frightening sight!!!   I'll add a pic and you'll see, he is a gorgeous dog, with the red dobe color, Shep markings and the catahouls head and face.  He akso has the catahould hunting instinct.  Bred for herding cattle and hunting wild boar with no fear of swamps and bushes.  When we got him from rescue at 10 weeks old as soon as he got in the back yard, right into the busahes after a lizard he went!!!  I've even seen him try to climb a banana tree!  He killed a black racer snake a few weeks ago.  Actually, he was playing with it and broke it!!!   My Teri had to finish it off.  Of course guess who got the disposal call!!!   LOL

BTW the mastiff was 185 and Tank was about 75 and 6 months old.  Tank won the tug of war and put the mastiffon her back!!!