The pens are 8x20 and its going to have a locking latch on it, im the only one in and out of the pen so i dont have much to worry about.
Otherwise i would definitely put in a double door.
its a work in progress... not a lot of room to work with but i do with what i have..
still have plant work to do and such but i still have a week in incubator and a few weeks brooder time before theyre ready for the fligh, lotsa work yet.