Ok maybe I should put it diffrently. I don’t mean like an attack dog. More like a security dog and not have him picked on by bigger dogs he can stand up for himself. The only training school we have is loaning him out to the local sheriff which they don;t gurantee his safety.
No, there’s no oversight for these kinds of trainiers, you’re way more likely to get someone who has no idea what they’re doing. This is way too dangerous to put this to chance.
On top of that, you have to work very hard to maintain that level of training.
Just teach your dog to be confident and well behaved, and they’ll know when it’s time to step in and protect you. Dogs do NOT need special training for this.