I would start over with basic commands.. practice 'sit/stay'.. and never open the door without having your dog in that position. Or put up baby gates at both doors until you can trust him. Get a tasty treat that they cannot resist, something you only use for training and practise calling your dog to you.. do it over & over until you have a reliable recall.
The treat I use is Benny Bully training pellets.. When my yorkie (as well as my other dog) are off-leash at the dogpark.. all I have to do if they get too far away from me is shake the container (it's like a TicTac noise) and they immediately come running back to me and sit at my feet... it didn't take all that long to teach them, you just need to find the right motivation.
Never scold them for coming to you and whenever they do come back.. praise them BIGTIME! As stated before, never chase the dog.. it is all a game to them and you have to change the rules now before the dog gets hit by a car.. good luck!
__________________ ~SUZOO & Kokoroo  ~ |