What do you do if it doesn't work? Lets say you tell him to down and he just growls louder? Now what?I have used this technique with many of my clients and it has worked well. Each trainer has a different method, do what works best for your dog. I have never had a dog I have trained think his growl has caused people to leave the room, dogs are social creatures being left alone isn't something they relish. I do agree he needs to be clear I regards to his place in the pack before he gets any older.