I had the exact same problem with all my yorkies at about that age! The only thing I figured to do is put them in a gated area if I needed to open the door first. Fortunately mine outgrew this phase and they are fine now (95% of the time anyways! haha) It was very scarey though EVERY time they got out!! Good Luck!
__________________ “Petting, scratching, and cuddling a dog could be as soothing to the mind and heart as deep meditation and almost as good for the soul as prayer.” ― Dean Koontz |