Wouldnt agree with that personally, One of my best ever sprinters is called Greedy Guts in the stock loft now, he was always hungry, never kept this pigeons on rations he always got what he wanted everyday untill he started to leave grains and even then he would still be looking for something extra, even though he had left grains in his galley pot, and he had 5 wins, 2 federation wins and missed bird of the year in federation by 7 points, this pigeon is still in my stock shed and is the father of my loft, breeds winners every year. Could he be an exception to the rule! Very harsh to say dispose of these birds with these traits, as there are good and bad in everything!