Got dogs in the house, so nobody will enter without some "yapping".
Got a gun in the bedroom too, - happens to be where I keep it, that's all.
Don't lock the house though.....
But the dog, yes, a very good idea.
A crossbreed between a border collie and a Labrador will make a very sweet dog, but with a bark of a much bigger one, - sounds like a 150 lbs dog....WOOOFF!