A miniture Dachshund to wake us up, and a very old (20's) Colt .38 on the bed stand. An even older (1903) Winchester 1897 upstairs. Those are the night time instant access defences. Both the revolver and shotgun started life as LE weapons.
My wife and I also have Dachshunds. We have 2, they WILL wake you up if a leaf hits the ground outside. Great alarm systems, but very stubborn. Love em to death!