I also was "gifted" two pea hens. I have found in my life the chicken comes first then the planning as to shelter. As with these pea hens. I let them live in my barn. the first two weeks I did NOT let them outside for fear of them leaving. Then I let them out when I was working around the barn and so far Knock wood they have came in the barn to roost at night. A few nights when it was bitter bitter cold they went in the heated chicken house! My friend caught mine by 1. waiting till they were asleep and just picking them up off where they were roosting on the porch. and 2. feeding them pancakes and one day throwing the pancake in a dog kennel and slamming the door shut behind them.