I have fourteen hens and a cockerel that is about to get the axe, literally, due to unprovoked aggression issues. I know I don't have to have a roo in my flock, but I have grown accustomed to the crow and presence of some 'yardly testosterone'. My run and coop was built to the 4/10 rule (originally had 16 birds, lost a barred rock to unknown etology at approx 4wks). My chickens free range every day from about 8-10am until sunset, rain or shine. I've noticed that all fifteen chickens roost along one 8ft roost, leaving the slightly lower 8ft roost bare. In early March (planned) will be an adjoining approx 140-160 sq.ft. run for our six ducklings. The plan is to have the ability to let the flocks intermingle, but also to separate if needed. Sooo...all that said: I want to add about four or five hens and two roosters in the spring. This would give me 18-19 hens and two roos. All hens are LF, dual purpose birds. The roos would be a Brahma and a Blue Laced Red Wyandotte. I was originally going to cull four hens to keep original par numbers but worried about not enough hens for the roos. Also, I am fully prepared to cull a cockerel in the event that I have another cowardly hit, flog, and run roo on my hands. I'm ok with some rude behavior with myself, but not where my one and three year olds are concerned. Does my idea seem sound? Thank you so much for any and all input.