Answer:
Two bodies have I, though both joined in one. The more still I stand, the quicker I run.
Thirty white horses on a red hill, First they champ, Then they stamp, Then they stand still.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
What has 4 legs in the morning, 2 legs in the evening and 3 legs in the night?
Vikings use this for warmth.
People take me on walks and I run and have fun. What am I?