Many Siberian Huskies end up as strays because they bolted past a houseguest or delivery guy at the door. It is very important to establish early that the dog is only allowed to cross the threshold when you say it is ok. The best way to teach this is to put the dog on the leash and have it sit. Open the door. If the dog starts to head out shut the door tell it ínoí and then ísití again. Keep repeating this until the dog learns that it cannot break from the sit position when the door is opened. Be sure to reward to dog for each success. After several successes and waiting when the door is opened, the dog can then advance to the next step. You will now cross the threshold yourself and then tell the dog íletís goí. The command letís go releases the dog from the sit position and requires no reward since the reward will be to go out the door. Do not get over excited about exiting the door as the dog will look forward to the excitement the next time and may break the sit.
It is very important to be consistent every time you go out the door . It is also important to keep in mind that while this will reduce chances for running out the door when it is opened a squirrel or other interesting object may cause the Siberian to temporarily forget all your hard training efforts.