Hi,I am just starting out and I am converting a block shed shed with a pent roof.My plan is to get 3 or 4 pairs of stock birds to start off,just to see how I get along.I am thinking of having a stock section and a YB section to begin with. The available space is 12' by 8'.My questions are how big should the stock section be?I will be putting in a corridor approx 2' wide along it and what will I need in the stock area.Will I just have nest boxes or will I need some perches also?Also I want to leave it big enough so I can add more stock birds if i require My second question is ventilation.I can leave approx 4 inches open the full length of the shed just underneath the roof on front and rear.Is this Ok or is it overkill? Thanks for the help guys.