i was lucky enough to own a pair of breeders that were class they were put in with another mans pigeons to be judged there were a lot of pigeons there that day he picked out the pair not knowing they belonged to one fancier and said if bred together would produce winners after winners well that pair were together they had produced winners at every level for me and others i belive there may be something to it just cause we don't fully understand it doesn't mean it does not work