Welcome to the Hereford breed! I definitely agree that she should be surgically dehorned-the sooner the better. The above posts have some great info, follow those techniques and use the search tool to find more good information on this site. A rice root brush is your best friend. Wear it out, then buy another one and wear it out again. You can also use a plastic wash brush in combination with the rice root brush. Those plastic brushes work wonders on some hair coats. It will be easiest to train the hair when it's wet, so rinse your heifer as much as possible. The one thing I always tell people not to do is let the hair dry with curls or waves in it; you should always dry it the way you want it to look in the showring. As mentioned above there are many good products to use in the hair to straighten it. I've had the best luck with Luster's Pink Sheen Spray/Weaver's Pro Pink (they're the same thing). Good luck and let me know if you have any questions!