[JoeyP]

There are a few techniques you can try to stop these behaviors
First with the barking jags ... Yorkies are high strung and they get into these barking zones where they bark and run and bark and run
And it is a mental zone they get themselves into
What you need to do is snap them out of that zone and get hem to refocus
What works well is either a water pistol or a whistle
Something that will startle them into focusing on you from there with a treat or a toy you can get them from going back into the. Barking jag

The lunging at. The door ... The Victoria Stillwell technnique does work
Have a patient friend to act as the person at the door and practice practice practice