Swat flies away
A long tail helps horses keep flies away from their bodies.
You cannot grow a horses tail, no way magically, unless you are insane and you are addicted to surgery to get a horses tail. that's all i know. Buy a foal or a colt. Let him grow. Its tail will grow with him.
White Horses of Summer was created in 1975.
Perhaps you are asking how to "plait" a horse's tail? There are some excellent videos online which can help you--just google them. Be sure to look for plaiting and not blaiting! :-)
it looks like a horses tail, obviously.
Tail docking was orignally done to prevent the tail from becoming entangled in the harness of draught and carriage horses. Today, it is done infrequently and more likely to be done to draught horses.
Not all roping horses have braided tails. There are many events where a rider may braid their horses tail because it helps keep it out of the way.
They stand head to tail to help each other swish flies away. They both swing their tails at the other horse's face to discourage flies.
To make it's tail shorter.
Eohippus is thought to have had a tail like a donkey.
Palomino horses are golden with a flaxen mane and tail
They do it to talk to other horses in a language.