horses grow really fast
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.
Horses don't have fur they have hair
grow up
horses generally stop growing around 3 years old, then fill out. horses such as paint horses and quarter horses grow to usually 15.5 hh. draft horses such as clydesdales can get up to 19 hh.
Yes, horses do grow out of their shoes. Their shoes can also become worn and need replacing because of that.
in trees
Yes
They both grow.
horses just grow their hair like humans do
average about 30"
saddled, top pocket
No