Answer:
The strangest creature you'll ever find has two eyes in front and a hundred behind.
White fat and fluffy, May even look like a puppy. Seems heavy but is light, Floats about without a worry, But if it turns dark you have to hurry!
Thousands lay up gold within this house. But no man made it. Spears past counting guard this house, but no man wards it.
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
What kinds of men are always above board?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?