Answer:
In my life I must bare my bloodline I must share.
Tear me off and scratch my head what once red is now black.
I destroy your home from the inside out.
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
My tail is long, my coat is brown. I like the country, I like the town. I can live in a house or live in a shed, and I come out to play when you are in bed. What am I?
Give it food and it will live, give it water and it will die.