I have 2 Indian Runners and about 50 chickens. I had 6 ducks, but a dog killed all but the 2, one male and one female. The grew up with chicks and now hang out with the chickens. I have tried making them their own sleeping area, but they insist on sleeping under the roosting chickens. The male duck actually chases the hens. I actually saw him mount and mate with one of the hens. I was surprised that she let him. I had been trying to see where the female would lay her eggs when she started. I use plastic milk boxes for the hens to lay their eggs. That is where she lays her eggs too! She goes in there before most of the hens are off the roost and the male stands around waiting for her. I have decided to let them be as 'chicken' as they want to. I don't think it will hurt them. I am trying to find a way to make a place for them to sleep under the chickens without getting pooped on though.