I have 6 chicks. 3 Barred Rock, 1 Rhode Island Red, 1 Red Sexlink and 1 Buff Orpington. The coop/run I built has a coop that's 4x6 and a run that's 9x11 and I plan on letting them range my back yard that's pretty good size. Is that enough room for a happy healthy flock? Also, I have a 5 foot chain link fence around my yard will they fly over?