MTG is the best stuff that I have ever used. I have a mini mare that we show in halter and she had a tail that was literally 2 feet on the ground behind her, I had to keep it tied up so she wouldn't walk on it. Then I had some goats and they ate it overnight when the escaped from their pasture, and they ate it almost to the tailbone. It has been 3 months since then and her tail is happily growing and is officially past her hocks and is just as thick as it was before. I put it on once every week and cover her tailbone in it and run my fingers through the rest of her tail and it works great! I would say I have gotten 9 inches of tail growth in the past 3 months on this mare. I have also used it on several of the other horses and have had similiar results with them.