So I have 13 chickens, (all hens) that range in size from Large Cochin to OEGB. I have two female ducks and one drake. They live together in a 35'-20' run in the day and a 10'-12'-8' house at night. The ducks have a 50 gallon water troft right now but we are digging a hole for a 150 gallon pound. This seemed fine and dandy to me until I started reading more about drakes and there mating habits with chickens. My question is, will my flock be able to live with my sisters ducks? Also, I want to get a Silver laced Cochin roo for 4H, would he be enough to keep the hens safe?