Shapleys Original Mane Tail Groom Trusted for over 75 years by vets and horsemen alike, add the Original Mane Tail Groom (MTG) to your grooming kit today. Shapley\\\'s MTG works the same both when wet and dry. With a special herbal diffuser, once dry MTG is odourless without loss of effectiveness. It is recommended you patch test Shapleys MTG before use - applying a small amount 2/3 times a week at the base or the mane or tailbone to see results. Independent studies have shown growth of up to 3 inches a month when applied to the mane and/or tail. MTG is also often used on dogs, cats and other livestock.