I have no idea about this concept, just that Holderread's book recommends it. If this is an offensive topic, I apologize. I just want to make sure my ducks are treated right, and they are about 15 months old now, and I get 2-3 eggs a day from my three. So, what's best for them? Force molt, to give them a break? Or, wait and see if they do it, themselves?