Lol. This is completely normal.
In the fall/winter, they will grow their curls. That their winter coat.
In the spring and summer, they shed out and look like a normal horse.
My curly still has a curly mane, fetlocks and you can see a wave to his coat but no actual curls.
Come late fall hell grow his curls, and by mid winter hell be right back to curly again.
"The greatest pleasure of a dog is that you may make a fool of yourself with
him and not only will he not scold you, but he will make a fool of himself too."