Hot oil is one of the best-kept secret in the Arabian horse world for those long luxurious horse tails! Hot oil treatments help your horse's tail grow longer by conditioning and softening the existing tail hair. To help your horse's tail grow longer using this method simply find Suave's hot oil treatment, which is very inexpensive at most drugstores. If you don't have hot water in your barn for this treatment to make horsetails grow longer, you can take a a thermos of hot water from home to the barn. Dampen your horse's tail and then allow the hot oil treatment to sit in the hot water for a few minutes, until it is warmed up. Once the oil is applied to the tail allows several minutes for it to soak in. This oil is a good treatment to soften tail hairs and prevent breakage. Preventing breakage is one of the best-kept secrets to actually helping tail grow longer. After the oil has soaked in, shampoo and rinse the tail carefully, being sure to thoroughly rinse out any residue of the oil or shampoo. You can allow the horse's tail to stay loose after this treatment or a can be braided into a tailbag, which will help the horse's tail grow even faster. This treatment can also be applied to manes but is only suitable for warmer weather, since tails are easy to wash without getting the body wet but with manes it is more difficult.