Barking at strangers

Have you tried clicker training. It is something to think about. Try using clicker every time the stranger comes by to distract her , and once she doesn't bark give her a treat. 

Hi Beth,

Bugger, that's a bit of a nuisance I'll bet.

There could be a variety of reasons why he's doing that, so perhaps have a read of the article below to get more of an insight. There are some different training options you can go for so hopefully one of these helps!

Good luck and keep us posted!

https://www.yummypets.com/mag/2019/07/29/130973/going-barking-mad-we-explore-bark-training-for-a-quieter-more-peaceful-life

Chewy