Kristan, Don't chase her. Wait until dusk when she goes to roost. She will either try to get back in her pen or roost somewhere. Just grab her while she is sleeping and put her back. I've stopped chasing them if I don't have a net and can wait until dark.
Watch where she goes to roost and get her then like dt says. and if you haven't been able to get her watch your dogs when they go out because they just might grab her. it's dark they won't know what it is.