Answer:
I am a word. I become longer when the third letter is removed.
What gets bigger when more is taken away?
I am a mother from a family of eight. Spins around all day despite my weight. Had a ninth sibling before founding out it's fake.
If a man carries my burden they will get crushed to death. Though not rich I leave silver in my track.
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk