I've been reading posts about "duck space" but it gets confusing with the differences between a sleeping coop, free-ranging, daytime coop... This is my set-up: I have a 12ftx6ft kennel with a half-covered top (all covered with fencing, half tarped). Inside is a plastic kiddie pool and a dog house (about 3.5x3 ft) that I lock them in at night. I plan to let them free-range in the yard occasionally when I'm home, but this would be primarily on the weekends. Right now I have 2 pekins and 1 rouen. I would like to get another 2 ducklings, a blue runner and a cayuga. Do you think I have enough room now? If not, how much space do you think I should add? Thanks!