Large numbers to compensate for lots of crap! Improvement will require I am consistent in the selection process. Presently my stock is out bred and will require some refining more than you have to do if all your birds sourced from same breeder.Great! with those numbers are you seeing lots of "improvement"? My numbers run smaller 30-40 at hatch and 10-12 for over winter . Only 3-4 are bred and the rest are laying hens. Small time operation.