Hello! New to BYC and thinking about getting Ducks. Live on a small farm with 7 chickens. I have a few questions for you experts. Never had ducks before and want really laid back breeds. Think we'll start with 4. So here's my questions. 1- chickens free range all day with access to feed and water. Kept in a coop at night. Hens are a year old. Can I put a ducky house in their existing coop? Will the hens and ducks get along? They're pretty nice and docile chickens. 2- thinking about 1 khaki Campbell, 1 welsh harlequin, 1 pekin and 1 Swedish. Is it ok to mix breeds like this? Want to try a variety. Also are these docile?? I don't like aggressive birds! Also I don't want breeds that will fly off or anything. Thanks so much! And any other tips would be appreciated!!!