My in-laws live in a neighborhood where a hispanic family who recently moved abandoned thier flock. They appear to be good looking, healthily birds, but I have never gotten closer than two feet to them before they run. The neighbors and my in-laws want them gone. I wouldn't mind a few more birds, and I would isolate them from my flock before integrating them so I can be sure they are completely healthy and safe. They appear to be Cornish Game, RIR, and some small creamy white breed. Any idea on how to catch them safely and humanely?