Answer:
Tear me off and scratch my head, what once was red is black instead. What am I?
I twist and turn and leave a loop. What am I?
Soft, hairy, from door to door. I am the pet that always stays on the floor. What am I?
I love spinach.
Goes over all the hills and hollows, Bites hard, but never swallows.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.