Never thought of myself as a shareholder beforeWhilst I agree that culling should be pretty ruthless, does the actual %age figure mean much? After years of such ruthless culling on functional/structural traits, there should be far fewer to cull for those issues each year (that's the point of culling them isn't it?).
If selection and culling is on performance too, as I believe it should, what would be the point of culling an animal in the bottom half of a high ranked flock, who may well be still in the top 10-20% of the breed? He will still be an improver in most flocks and likely has something to offer.
If you're only culling a tiny number, in order to maximise sales numbers and keep the shareholders happy, that's a different issue perhaps.