Victoria Stillwell videos.
She used to have a show called
“It’s Me or the Dog”.
She did a lot of shows where the dog hated strangers/other dogs.
Basically she had the owner change direction if the dog got upset or tried to attack other dogs.
She also demonstrated how to train dogs not to attack or bark at strangers coming into the owners home.
I loved watching her show. I wish it was still on.
She is an excellent dog trainer. IMO.
There is also Brandon McMilian who used to be on Lucky Dog. I watched his show every Saturday until he left.
I found him be an excellent dog trainer as well. Although when he picked a dog from the shelter , he always made sure that it wasn’t aggressive or a fear biter before he would work with it.
He has videos on YouTube as well.
Granted I only saw his TV show which are always edited ,but his training methods seem consistent.
Good luck. Cute dog.