I see.
My ducks didn't start resting in the dogloo until the summer Equinox happened. Even now with our nights sometimes dipping into the 30s they don't spend all night in the dogloo. As long as I know they're safe I'm ok with them sleeping any where they want inside their locked pen. My girls...
I have no idea if this would work for ducks but I have used this technique for other animals that seemed skittish of people or being handled.
Put a blanket down on the ground. BRing a book or magazine or music to listen to. Bring a treat that you have lots of.
Sit on the blanket and ignore...
I tell my girls time for bed and I walk towards their night pen. 90% of the time they follow me and walk right in. If they've found a particularly rich forage spot (night crawlers, chicory or frogs) they'll follow me for a bit and then run back to their foraging spot. I'll tell them time for...