Everyone has had good suggestions, in another thread some one mentioned that even if you can't have a dog, it doesn't mean you can't leave "beware of dog" signs, food and water dishes and a couple of chew toys (Maybe a REALY tore up car tire

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Burglars HATE dogs ! Some of the things suggested take time to arrange, but RIGHT now consider if you can take a safe position on the ground floor, keeping all family members out of the line of fire, but controlling access to BOTH stair wells ? you may lose valuable stuff from the rest of the ground floor but ,so what ? STUFF can be replaced, lives can't.
On code words, Often in intelligence nets, the absence of the "safety" signal is in it's self the "danger" signal. Train your wife and kids to unlock/bar the door of the safe rooms ONLY if you use the SAFE word, otherwise they should ask "What", "What did you say ? If you repeat and still do not use the safe word they should ignore any noises they hear until you tell them to open up and DO use the SAFE word. Unpleasant thought but if you are under duress of some sort those noises are liable to be frightening. Under your conditions I think your wife has a duty to you and her children to learn at least the basics of firearms handling, your situation is nearly impossible for a LONE man to deal with outside of the movies.
Now I will probably find exactly the same things I've said on the second page I haven't read yet
