Hi, just looking for some advice. We have had laying hens for just over a year now, both white leghorns and ISA browns. Out of 55 hens I would average around 40+ eggs a day all last summer and even through the winter. Now suddenly, this last two weeks I'm lucky if I get 2 dozen eggs a day out of 55 birds. I haven't changed their feed or their environment. They are already done their moult.... I don't know what else it could be. Help??