I asked what you thought was the most natural instinct for a homing pigeon? If the loft was on fire then they have no home and will move on? If the loft stays then they will stay unless something else makes them move, if you have ever tried to break a bird from another loft then you will know how hard it can be and often a bird sucessfully broken will still return ocassionally to a loft that has an association. My mate Yeboah has aloft 25 miles north of me on line of flight, he had a red hen which sat on my house roof every race that he sent it to be it late or on time. This is because experienced pigeons still do things from habit so inexperienced pigeons must learn? The homing pigeons that choose where they live are about as much good as a chocolate watch!!