I agree but your are not giving them enough credit for being smart. If anybody knew what made them come home from such great distances then we would be smart but as it is nobody can answer than question outright with a definitive answer so in my eyes that makes them extremely smart and def smart enough to dodge rain showers they can see from miles away, no problem and they will make it home even if they are not motivated, well bred and have crap management, maybe 2 weeks late but they are still home. Don't decry your racing mentality though :-) :-)