As an Old Soldier I look at likely avenues of approach, and of retreat, burglaries and B&Es are usually very quick " in and out" operations. And defense in depth, slow them down, wear them out. And as a technosaur I look for low tech rather than high tech solutions. They often require developing careful habits and SOPs, perhaps training other members of the household. Seems to me boards with spikes would make an invader think twice, tripwires to knock them off their feet, a door left ajar with a sandbag or other heavy weight perched on it. Crude, but they embody the KISS principle.
I recall a TV program (yes, I know) in which the good guys dealt with the villain's guard dogs using drugged meat, a hypodermic needle gun in another.
And as noted home defense plans must involve the whole household, perhaps deciding who will be the defenders and who will shelter in place.
I think I’ve seen that first part in a movie too. It’s called Home Alone.
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