I do cull at hatch, when I see the obvious flaws, like white on them, white toes and so on. I have no need to keep these chicks and have to raise and spend time and money on feeding them just cull them later down the road when I can already see the flaws that they have. Because most likely they will not leave my place anyway, and if they do, on to be given to a very few friends that will process for meat. I know already what the line throws and what the results are after growing some of them out. So for me to get where I want with the breed, it is just better for me to do mine first cull at hatch and go from there. I am already getting better results and hope with every generation the one line will get better and better by me doing this. I probably cull 85 percent of the one line at hatch this year, and the other 10 to 12 percent by the time they were 4 or so months old. This may not work for most people, but for me, I know it is the fastest way for me to get the best breeders for this line and to improve on the line a lot faster.