A diet with vitamins that stimulate hair growth can help. Or a shampoo that has the vitamins. Sometimes diet can effect hair growth. I know since I switched my mare to a different feed she's gotten a really nice mane and tail, and her coat shines so nicely. Also, trim the ends every couple months, condition it and all that. DON'T brush. For Saddlebreds, we pick out their tail, and I do that in hunters. It makes their tail 100 times more full and it doesnt break the tail.
“Have fun - Stay on top.”
"There's nothing like sixteen hands between your legs"