My gf is a trainer who does board and trains and it’s quite effective but only if everyone at home with the dog follows instructions and the rules suggested for the dog.

A dog will be great with us but will regress very quickly if the family doesn’t stick to the structure provided. And the new structure and rules are especially important once the dog is back home because when they go back home, they think they can go back to their old behaviors.

And finally, if it’s a purely positive training, then it absolutely will not work for cases like this.

A lot of purely positive are against “balance” training where we use tools like eCollars and prong collars and will correct the dog. They claim it’s abusive and conflate eCollars with shock collars (two very different things and you absolutely should be against shock collars). But on the flip side, they’re okay with putting down dogs like this.

I could go on forever, but you really want a balanced trainer who is willing to use tools, but not one of those super macho trainers who borderline abuse dogs.

eCollars, prong collars, kennel training and proper balanced training save dog (and possibly human) lives.

Around 4 years ago we got a “problem” dog that’s worse than yours from a shelter and he’s been fine with the tools and the structure we put in place and he’s living a great life.

So tldr: find the right trainer, follow the rules and you should be fine. But if you slip up with the structure and get loose with the rules, the dog can start regressing.