Day 22 is today...don't know when the duck eggs were laid, but they've been in the incubator for 22 days. Today, the eggs started rocking quite a bit. We've hatched chicken eggs, but not duck eggs. Is rocking at day 22 normal for duck eggs or should I expect an earlier than expected hatch. Temps have been great the whole time. If they're early, then it's most likely due to being laid as many as 5 days prior to incubation. But prior to incubation, the eggs were just kept in a basket in a cold (45 degree) barn. Sure appreciate your thoughts.