Struggling with leash biting/tugging

[Brucey Baby]

Update.. Things have been a bit better yesterday and so far today. We've been trying a combo of calm assertive and ignoring the behavior. Along with making him sit, stay and wait at each door (there are 4) on the way in and out of the building. I've been rewarding the good behavior (sitting, staying, waiting to be released at each door) with a treat on the way out and in. So far that's been distracting him, and he seems more interested in getting back to the door to get a treat. We'll see how it keeps up.

Question for the group... How long do I continue "treating" the good behavior before I start scaling back the treats?

Sounds like he's getting it :-) He's young so keep at it and it'll stick