Cats and ducks

So i have
two dogs
five indoor/outdoor cats
three barn cats
i am now taking in two 6 month old female Rouen ducks a friend wants to get rid of
I have owned four peking ducks a long time ago,
I put them in the huge chicken coop at night but in the day i let them out to let them run the yard, i will keep them in for awhile because of cold.
Rouen ducks are 6-9 lbs the Peking are 8-11lbs

here they are both 6 month old female Rouens