I'm very new at this; the coop is about done and we are getting ready to start the run and order chicks. If the chickens are locked in the coop every night, is it still important to cover the top of the run? I would still have to do something to prevent / discourage hawks, but was wondering if the idea I saw on this site which used the old cd disks suspended over the run would be sufficient for this? On another note, should chickens be locked up every night, even in the summer? (If not, then of course this answers my question about not covering... ) Thanks in advance for the help.