How to Detangle a Badly Matted Horse Mane and Tail - Good tips. I do not wash first -- hair stretches too much when wet. Also, liberally combing Cowboy Magic through my horse's mane is part of my "pre-storm prep." I use one of those hair picks, made for curly hair. And, I work on knots every day while she eats -- before the dreads get out of hand!