How well do Rouen ducks lay? How often?
Are Khaki Campbells going to be nervous if kept with calm ducks?
How can I tell if they are female or male- various methods?
Tips for raising them completely outside?
This looks like a duplicate of other threads you've started.
Links to the other threads so that other readers may follow along (especially if they find this thread through the search function.
On raising outdoors:
As for the other questions..
Here's the Kahki Campbell thread which may help you with the nervousness question: http://www.backyardchickens.com/t/302654/the-khaki-campbell-duck-thread