I have a old horse pen out front that is 150 feet by 100 feet, thats a estimate. To me it looks like enough, but you never know. Also can emus get a long with mini horses or is it something I have to worry about? I really want one but am on the fence still and wanting to make sure I have the things we need and I know whats what before I do. I feel like the field is bigger then that but when I measured between the posts it was ten feet between each post, and its 10 posts by 15 posts.