I have 5, eight month old hens (two sex links, two Aracaunas, and a buff orp). I also have 12 RIR that are 6 months old I raised them from biddies. I gave them Purina starter until they were five months, then switched them to Purina Layena. I do give them a lot of our left overs. They have a huge coop and run. The nest boxes are not all that pretty and I am going to work on that today. I have given them crushed oyster shells. I am just very sad to not see one single egg. Can anyone help me?????