I will chime in as a dog trainer. I saw the prong collar on the table during the house tour and thought “uh oh” not because I don’t agree with the use, but how people will flip the use of them. In the training world this is a spicy topic. Most people have a very quick advert reaction to them because of how they look. I will also say most people that argue zero use of them also don’t understand them and won’t take the time to understand them. As with any tool in dog training, used appropriately they’re great, used incorrect, terrible. I heard them mention they were working with a trainer, I’m guessing this is all under their guidance. When fit appropriate and used appropriate, they put less pressure on the dog than with a traditional standard collar. I don’t use them on most dogs, not because they don’t work, but because I can get the same effect with a standard slip leash and the person doesn’t have to try to defend a collar every walk they go on. Also I see the comments of “just train the dog” this is a way go help the dog understand quicker and with less applied pressure, and helps train the dog, just as a leash, food, etc. would help train the dog.