an aviary is a GREAT addition to any loft, especially when you are having problems with hawks. but even if its 10 by 10, that is no where near what they would get free flying. free flying they can go fast, high, out of sight, in trees, etc. in an aviary, they have no freedom.
don't get me...
start training them! start by letting them see all around the coop, and go thru the trap door 20 or more times with a settling cage placed around the trap.
What breed? are they homers?
no! ideal agw to start, with supervision.
what type of trap door do you have? you shouldn't let them fly all...