This will be my first winter raising chickens and ducks. They were hatched May 2015. I have had my girls on the layer food and scratch. I have also started giving them some crack corn. I think only 2 or 3 out of 7 is still giving me eggs because I will get maybe 2 or 3 eggs a day from my chickens. I was wondering if I should feed they something other than layer feed over the winter. I live in Richmond VA.