Undines - I occasionally slap our dogs too. Things like if they're biting electric cables or being territorial in the house with friends dogs. It does seem effective but I hate to see dogs cringe from a lifted hand or a newspaper - or smacked for something like chewing due to absence anxiety or when they've failed to come back, these are counter-productive. I'm a fan of harnesses, aren't about not having to train dogs not to pull, they're about protecting trachea in small /medium breeds which not infrequently suffer tracheal collapse or more mildly, chronic cough, due to walking with a collar / lead. My present dog is very disobedient from babyhood & smacks just don't work, (he seems to like them although it's obvious he knows they're meant as punishment) but with lots of training & time & training treats he will now consistently do the things he needs to do.On the plus side he avoids dogs he doesn't know, plays with those he does & will let the vet / groomer do anything to him without complaint. Don't agree with Barbara's training methods but it's always refreshing to see a character like her on TV.