I had a friend take care of my runner ducks over Memorial weekend, but I didn't have her collect the eggs because the nests are kind of hard to get to and I didn't want to abuse the favor. I figured I'd just throw away the weekend's eggs when I got back. However, I found two of the runner duck hens sharing nest-sitting duties, and they have continued to do so thus far. Since runners are not known to be good setters, is it likely that they will lose interest before any potential hatch date, or, since they've done it this long, might they continue? I've left those eggs with them so far, just to see. The one hen hisses at me and seems quite motivated to stay on the nest. She even chases the rooster (chickens and ducks share space).