Tomorrow is the first early cull on Australorps. There are about 80 to sort through, but we'll maybe only look at the older birds. That should bring numbers into a slightly more manageable state. I've got 500 other chickens and need to space everything out to start choosing my keepers for next year, not to mention school starting in two days. Unfortunately my breeds all mature late and first culls are for head structure and eye color and for any obvious defects. Aussies till be culled on narrow bodies, narrow tail set, and obvious conformation problems, like tails that are above 60 or below horizontal. Sometimes flat backs change so I let low angles above horizontal stay. I try to avoid lazy birds that droop their tails, especially females. If it doesn't change by 6months they are culled. Already culled a cockerel and pullet for white legs an brown eyes. And off to a good season of Australorp showing from what it seems.
Zach