Jake Gyllenhaal and his German Shepherd Jake Gyllenhaal and his German Shepherd Jake Gyllenhaal who earned worldwide fame in his as Jack Twist in "Brokeback mountain" takes his German Shepherd Dog "Atticus" out for a walk. German Shepherds are one of the most popular dogs in the world. With their fierce loyalty and intelligence, they are used as police dogs everywhere. The color of Atticus is the most commonly recognized color of GSD's, but they can be other colors. All Black and all white ones are the rarest.