We just lost our male Pekin duck yesterday., He paired well with a white crested when they were introduced. Last fall we purchased 2 Roen ducklings. They all turned out to be males! The male Pekin and the male Roens tolerated each other when we introduced them. .Yesterday we purchased 3 Khaki Campbells. ( one male and 2 females) and one Blue Swedish hen in an attempt to make the male/female ratio a little better. The blue Swedish hen became very aggressive toward the Khaki Campbells (fortunately through the fence). Our flock (The white crested female and male Roens) discovered that there were new ducks in the pen and came in from the lake to check out things. The blue Swedish female escaped and chased the white crested and two male Roens down to the lake. We can't find either the white crested female or the Blue Swedish. The poor Roen males are sitting near the bank of the lake quite bewildered by whatever transpired between the females. I have not let the Khaki Campbells out of the pen( thankfully thay are safe in the pen and not on our lake! ! got 2 eggs from them this AM I plan to leave the Khakis in the pen and let well enough alone with them. My husband will want to let the Khakis out on the lake, I know. 1. Am I right to provide for them and keep them in the large pen as layers w/o access to the lake? 2. Should I add any females for the Roen males who live on the lake and will not come back into the pen? HELP!! .