Na, just use that shavings fork without any wire. I'm telling you, it is a real skill to work a fork and a rake the way the racetrack grooms do. You don't dig into the sand--just take what's on top. Give it a couple of little flips, sort of like a chef flipping food in a saute pan. The sand will fall out. Then, gently rake the remaining bits into a pile, put the pile onto the upside-down rake and flip that a bit. You can get every bit of straw and manure off the sand and leave all the sand behind. It takes practice.
All joking aside (although I would never joke about the skill of a racetrack groom!), you don't have to get it perfectly clean. These are livestock.