Your voice by using INTERCOSTAL DIAPHRAGMATICS — Look it up and you’ll be amazed at how effectively it can control your dog’s behaviour. It worries me that you refer to “tools”. Any training equipment whatsoever should be used properly and for the purpose it was designed. Training equipment should NEVER force a dog’s behaviour. Instead it should assist in persuading the dog’s behaviour. Training equipment should be used by professionals and then taught to clients interested in learning how to use all equipment correctly, humanely and responsibly.