
Have to agree with the others here, its got absolutely naff all to do with dominance (which in my opinion does not exist in dog-human relationships), but to do with training.
Simply, dogs do what is rewarding. Its NOT rewarding to pull you, but if it IS rewarding to pull with your fiance, then the dog will do so, end of story.
Take away the reward, behaviour will stop.
If you go into some kind of so called Dominance reduction program however, you are quite likely to start up a whole load of other problems, my absolute and best advice is this 'forget about dominance, it is bullcr*p!'
Dont confuse dominance with other dogs with this so called dominance with ppl. Dogs can and will display dominance, attempted dominance and a whole load of other things with other dogs. However you are NOT a dog, and your dog IS smart enough to know that.
Sorry if this sounds harsh, but ive spent considerable time reading a forum dedicated to the use of harsh methods and centered around dominance theories.....with the predictable results from treating dogs in this way.
Em