The hoodoo of a repaired door

My ducks are so funny. I repaired the old door to their pen a couple of days ago; its the same old shape, hinges and wire, but has three sides of new timber. But will the ducks go in and out? Not on your nelly! These creatures that can so easily not notice if one of their babies goes missing, do not trust that door one inch. The first night I had to catch them individually and put them in, yesterday they didn’t come out all day, then today I had to chase them out. Now they have been lingering suspiciously outside again, but have finally decided to make the daring crossing in, lured by new pond water.