HI Danielle, it's Terry, congratulations on your daughters filly making the finials, and as for her tail, Only brush it wet after washing and conditioning. with any shampoo will do, what ever you prefer, but, I like to condition it with a human conditioner such as pantene. Then brush and comb, then french braid the day before the show. For those little lose hairs at the top, slick them down with baby oil gel. My Grandsons 4-H tricounty show was this past weekend and his mini, Honey Suckle Knoll Tiawana Sungold was Champion of Champions, and this is his third year as such. These kids have so much fun grooming and showing their mini's. You have a very nice filly there. Wish I was closer to help you out more.