I have some rouge friends like that in the middle of nowhere Wyoming, but I haven't been out that way to visit them in a while. You'd just whistle also, but they didn't exactly thunder across the high plains. It was more like a where coming, so just hold your horses and we'll be over to see ya. http://www.treasurenet.com/forums/my-daily-snapshot/430101-just-whistle.html
Pretty horses. We have some wild horses that are shipped here from out there here in Oklahoma. Some gubberment program, but I do love to watch them play in the fields.