Some of you might know that I have 6 khaki campbells and 6 cayugas that are only 3 days old. What age do they start laying at....also, when they are about to lay, what feed do I switch to. Would the Dumor 16% Layer Poultry feed work fine with ducks. One more thing, when they do start laying, will the eggs be fertilized or will that not happen to next spring when they are ready to mate. I'm just wondering if I'll get fertilized eggs this fall. Will they mate both breeds mate year round? Or just the campbells?