Scout has been around them from the beginning as ducklings, I think that is why he is tolerating Geralds nipping so well

We've also been just watching up until today, because he is being a good drake and taking care of his girls. He does a good job of rounding them up too. So it's been drake behavior that I'm ok with, until recently.
As soon as we get through this cold spurt we are having at the moment we will be adding some fencing to section the ducks off as we do some major work in the backyard to get the grass back and contain the ducks into their own specific space with supervised frolics into the backyard and garden. I think that will solve the problem, they will have their own space and the dog will have his own. And we will reclaim the backdoor. I will miss seeing them napping right outside the door though.