It is late, you are in bed when you hear a noise, Where is your gun? How fast can you gain your bearings in order to properly defend yourself?
How trained are you with your handgun?
If you haven't spent time on the range undergoing stress drills and running scenarios then you will either over react or under react placing both yourself and others in great jeopardy.
A well Trained Dog can deter crime.
A protection dog will react immediately.
You can call a dog back unlike a bullet.
A protection dog is a well trained, social member of your family.