Does he get any other exercise? 1 mile a day is nothing, really. He needs to run hard, so for a hike, play fetch in the yard, etc. Shibas are hard-wired to go after prey and aren't good off-leash candidates, so don't let him loose in an unfenced area. He pulls on his leash because he hasn't been trained not to--Google "loose-leash walking" and "silky leash"
No dog is a "lost cause", but it does take a lot time and effort. Are you willing to put in that time and effort?
No dog is a "lost cause", but it does take a lot time and effort. Are you willing to put in that time and effort?