Answer:
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
You use me between your head and your toes the more I work the thinner I grow.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
Take away my first letter take away my second letter take away all my letters and I would remain the same.
The more you take away the bigger I get. 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