It's not the size of the dog that matters,it's the barking that puts off an intruder.A burglar wants it as quiet as possible to nip in and out.If you are thinking of an intruder who is deranged and dangerous ( not a common occurance) then make sure that you not only lock doors, but have a bolt or a chain as well.Only open small top windows for fresh air at night, and if you have a gate outside, it needs to have two bolts on it.
Sensible precautions.
After that, stop worrying, smashing windows or doors to get in to your property only usually happens in daylight when the owners are out.
Have a phone in the bedroom, and a room where you can lock yourself in, a bathroom say, in an emergency.
Never wedge furniture against your bedroom door!
Above all, stop worrying.
More people are attacked in their homes during daylight, when they have allowed strangers into the house.....that's where a strong chain on the door comes in useful.
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