Answer:
I am longer than a decade and shorter than a millennium
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
Sing me to a baby about to go to sleep.
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
What can you catch but not throw?
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