Currently we have a setup where we have 9 Australorp hens and 2 KC ducks (male and female). They share a 300sqft run but they have separate houses. The ducks have a 16sqft house. When we bought the ducks we were under the mistaken assumption that they were sexed and both females. However, apparently that was not so. But that's ok. We've come to love both. However, I had been reading that there should be at least a 1:3 draken ratio so as not to wear out the duck hen. Also, I just saw the drake mount a chicken today and I've been told that it's bad news. So, I guess we have decisions to make.... There is a couple of ducks that are being given away. They are both a yr old, both female. One KC and one Cayuga. My concern about this is that I know nothing of how they were raised and dont know what diseases/parasites they may bring to our ducks and chickens. Another option is to order a couple of female ducklings, raise them separately til they're almost full grown. Third option is to separate the duck and chicken run and separate the drake and duck hen, if necessary. It would be quite sad to separate them though because they're quite inseparable at the moment. So far those are my ideas. Again, we're new to this so any advice is appreciated.