I did 5 days scrap and 2 days feed and that seemed great for them, I got great eggs and they loved it, then one of my 'suppliers' stopped helping and I'm down to three days on sraps four off and my eggs have dropped with the heat anyway.
Remember is 1/4-1/2 pound per adult standard sized animal or if you feed them and there is still food in 1 hr it was too much, otherwise add supplementary feed.