I have a Shih-tzu age one. He is very well behaved with one exception. He will dart out of the door and run. I know this is a game to him but, it’s not funny. If he is in the back yard (finced in) or in the house he comes back as soon as called. It’s only when he is beyond that scope he runs. I am so scared he will get hurt. Last night he darted out the door and ran like hell across the street and all around in the neighbor hood. He is very small only 8 lbs. He has been clicker trained but won’t come even for the clicker. We do call and click to to avail. I know it is wrong but I panic. He seems to think it’s all a big game. Please HELP.