Answer:
I am an animal and a hair product
I am constantly overlooked by everyone but everyone has me.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I am black and white and full of fuzz
I come in variety of colors and am found almost year round. My house is tall and my only fear is the cold. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.