With the jersey giants the faster growing birds are what you don't want, the slower growing lankier birds end up the bigger meatier ones. So my data is going to be the end result, easy. I read it in a old book on giants, a breeder said the way to ruin their size is to select the faster growing stock for breeding. I will be waiting until they are fully mature before I select my breeding stock. The largest will live to breed, and I'm sure the ones that are not the biggest will taste good.