Hey, all, I have four sex links, three and a half years old. They lay only occasionally - should I still be giving them layer feed, or would they be better on something else? The few eggs they do lay are either shell-less or so thin that they are broken in the nest box. About once every week or ten days we get a "real" egg. They have oyster shell in their run, too, and they aren't touching it. Thanks for any input.