I Knew It !

 My sister lived in a quiet neighborhood . She lived in a brick house identical to the three other brick houses on opposite corners . Two of the other homes were robbed . Police said my sister's home was spared because she had a dog ! Many rough guys are fearful of needles & dogs ! The rest of the world fears spiders & snakes . . . farmer's friends ! 

Would be criminals , be wary , I have my own canine alarm system !