Shapley s Original M-T-G For horses and small animals Original M-T-G is veterinarian recommended as the only solution needed for a variety of bacterial and fungal skin problems. Original M-T-G treats a variety of skin problems quickly and easily with results seen as soon as a day after the very first application. Original M-T-G successfully treats the following conditions: rain rot dew poisoning scratches mud fever greasy heal sweet itch girth itch itchy skin dandruff and tail rubbing. It has been touted to work on thrush and white line disease. Original M-T-G is easy to use. Just rub a small amount into the affected area without disturbing or picking the scabs off.