Answer:
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
Blend a teapot shot so the pearlies won’t rot!
I move without wings, Between silken string, I leave as you find, My substance behind.
A serpent swam in a silver urn, A golden bird did in its mouth abide, The serpent drank the water, this in turn, Killed the serpent. Then the gold bird died.
People take me on walks and I run and have fun. What am I?