Mine are totally separate from the Chickens..My Ducks hate the Chickens..I have Call Ducks and then Huge Brahma and Orpington Hens..Almost lost a young Duck when a Huge Hen landed on her neck..They had escaped the fencing, the Chickens were loose and a Hen flew up in all the chasing and landed on her. Yikes!.. She is fine though..The one in my avatar..I have been debating whether or not to attach it to the chicken coop/run or have them totally separate. Why are your choosing to incorporate your duck housing with your chicken run?