28 days for incubation of duck eggs

My advice would be to keep the humidity lower than for chooks eggs until day 25 then crank it up to as high as you can get it for the remaining days. I ran my incubator dry (no water) for my last hatch and the humidity was under 30% most of the time. My air cells still could have been bigger... At hatch I use 70% which is as high as my incubator will go.
What colour were the Indian Runners? And, yeah, knowing if the Campbells were the Mum or Dad is important.
Any female offspring should lay pretty well

Might make you give up on the chooks
