A return visit from the fox

We lost 2 of our ducks to foxes earlier this year. We therefore decided to hatch some of our duck eggs. The result was 5 ducklings, all of which grew rapidly into adulthood. More recently they started laying. Alas, they had also stopped used the duckhouse at night. No matter what we did, they would not go inside. So we accepted that they would be outdoors through the night, leaving them vulnerable to foxes. What surprised me was that there were no fox incidents for nearly two months. Unfortunately, that ended on Friday morning. Two of the ducks hatched this year were nowhere to be seen. There were no feathers or body parts left behind as evidence of the fox's activities but there can be no other explanation for the ducks' disappearance. So, we are going to hatch more eggs. They go into the incubator tonight.