Answer: Hydration. Sheep drink water, or absorb them from grass, pass out urine which is subsequently by evaporation goes back into the atmosphere to fall back as rain.
Explanation: Sheep do take in water from pools in pasture or water molecules could be extracted from the rich, succulent grasses they graze upon. The purpose of this is hydration. Water on passing through the tract of the animal comes out as urine and is excreted onto the soil. Water molecules in the urine on the soil is by the process of evaporation taken back up into the atmosphere which eventually falls back as rain onto the pasture fields. As such, this is one way water can cycle through sheep.
