Water makes up about two-thirds of the rabbit's body mass. No other nutrient has as many functions. It serves as a solvent for digestion, transportation of nutrients and waste, regulation of temperature and lubrication of joints. Rabbits eating dry food in warm weather will drink 10 to 20 ounces of water a day.
Clean water is essential for maintaining healthy rabbits. A deficiency of water will cause poor lactation and slow growth.