If you are near a nest like I am then visits will be frequent enough to make roosting of flock without confinement impractical. This time of year until tree leaf out you may also have great-horned owls hunting during day. If so, then you may finding need for using a cover run. My dogs put stop to owls actually taking birds but that option is not available to all. During day free-ranging can also be done with you present. Number of owls should drop to two until about April or May when owlets fledge and then start flying about.