Police are looking for the dog of a 65-year-old man who suffered life-threatening injuries during a Sunday afternoon assault in the Tenderloin. San Francisco Police said in a statement that the dog ran away after it was kicked by an unknown suspect. Officers found the man with life-threatening injuries near the area of Post and Leavenworth streets at about 3:32 p.m. on Sunday. Paramedics transported the victim to a nearby hospital for his injuries, and the victim advised police that the assault happened after the suspect briefly interacted with him. The dog…..