It's full dark right now and my 5 pekins are still in the pond. They are ~ 5-6 weeks old and love being in the pond. The temp right now is 64' but I don't know how chilly it will get tonight. I don't have to worry about predators except for maybe a roaming cat, so I think that they would be alright in the pond as long as they stayed there. However, I think it would be prudent on my part to put them to bed in the coop. Even if they don't seem to like going to bed. Your thoughts?