IMO, no pet dog should be TRAINED to guard. That's taking on a huge liability.
ALL DOGS, regardless of size, will be territorial to some degree. Even my Whippet will bark when she sees somebody walking in the courtyard of my complex who doens't live here.
The fact of the matter is that ANY dog will deter a non-serious criminal and any SERIOUS criminal will just have some means with which to disable the dog ahead of time (pepper spray, gun, tainted meat, etc.).
It is OUR responsibility to protect our dogs - not the other way around.
I have always truly believed this. Our dogs love us so much.I think in a serious situation to where the golden knows it's owner is or would be harmed, the golden will automatically move into protection mode, or guard it's owner. Sometimes that sweet little golden we all have in our hands will totally take you off guard and you may see a very different dog. In normal situations goldens are to be friendly and loving towards all humans and other dogs, that is there nature...but in abnormal situations is when you may see something different. It is not something you have to teach, or train for....it is there, they are dog and no matter what the breed many will protect in abnormal situations. I have no doubt in my mind Kody would protect me, as I have no doubt in my mind Bianka would protect Jeremy or I if they had too.
Barking will deter a stranger, and definately will make one back up. No one should ever believe because they own a golden it will not protect on it's own, or feel the need to train for this because it is there and if that bond is there so will that protection be there if it were ever to be needed in a abnormal situation. They will infact pick up on that. A golden is not a soft dog, many people have the assumption they could break into a home and the golden would walk them through....not always true with many of them since as I stated...they are a dog over the breed! And as the standard states, in normal situations they are friendly to all, it is the abnormal situations people need to be aware of and pay close attention too.
RM just gave a perfect example of what a golden can be in abnormal situations in the golden, think dog....not breed!