I have cats, not dogs, Am a diagnosed paranoid, and have a motion detector in here SOMEWHERE.. don't ask me where, i do not use it.
ONE time I got ripped off while camping.. at a campground where they took only things OUTSIDE the Trailer (Lost my breakfast even before I could eat it) So I got a new cooler, more breakfast/lunch/dinner and locked it in the tow vehicle at night. Only time I ever had an issue.
Idiot wishes to break in and not only will Watch Kitty alarm.. but Beware the Owner, There is no dog but there is an owner and though I do not personally carry a thunder stick... I can do major damage without one.