Hard today to get the old kind but it can be found, you can use old cameras that are wired to record only to a hidden dvd burner. And here old fashion pager set up for notification, won’t tell you what went wrong just that a something did.
A dog, not fool proof but most thieves will move on till more desparate times. Poison proof your animal, food/water only in one place, dog gets sick watch out.
Can add visible deterants thorny rose bush under windo, decorative bars, steel doors, a few black domes that look like cameras, if rural a car chime once someone drives up you road, one they can hear. Signs warning of attack dog with your dog barking.
If you know local gang and hobo markers you can place appropriate markings to deter the local low lifes.
Can use a glitter bomb on packages outside, a dumby package they steal and goes bòom with sparkles, you can see on you tube, if legal in your area thieves will avoid unless you flash something super high value as who wants to try a booby trapped house.