Yesterday I bought my first ducks--2 adult Ancovas and 2 adult Runners. The Ancovas are fine--they've spent all their time in conversation with the Ancova flock across the street. But the Runners (both females) have been hiding out somewhere. Yesterday they spent all afternoon behind some bushes on our 1-acre property. (Almost all our land is open field.) We finally tracked them down and herded them into the duck coop. Today I haven't seen them since I let them out this morning. I've searched everywhere for hours. I doubt they've gone anywhere, since our entire property is surrounded by a chain-link fence. I certainly don't want them exposed to predators at night. Any suggestions?