Hey If she moves fine there shouldn't be nothing to worry about, only if she was favoring her leg should you worry because then she has pain. if she is showing no signs of pain, no worries, she is fine then,
i had a standardbred (previous owners that had her had her in with a bull and she kicked at it and hooked her hoof and tore it.) when we bought her she showed no favoring no signs of pain, we asked a farrier what we should do and we put an "o" ring shoe on it, before we sold her again he hoof was back to normal. i still rode her, because she was showing no pain and she proved a few times that she was showing no pain, thats for sure.
anyways that was my little story.