LOVVEEE the halter, but I don't know if it's really her color. It doesn't look bad, but I (personally) think blue or orange would be a bit more her color, but if it's going with camo tack (Which I kinda like for her), then I would be afraid of that caliber of neon would really outdo the camo and make it look mis-matched. I'd go a more camo color like a softer green (since brown is boring). Leather would look WONDERFUL with that camo, but way more expensive.
My two-cents on it, being a tack-matching obessor ;) LOL.