Cats may not like water when it's in the form of a bath, but water is very important when it comes to cats. In fact, water is one of the most important nutrients that they require. A cat can live weeks without food but, because they have a limited capacity to store water, they can only survive a few days without water. Water helps to eliminate waste, enable salt and other electrolytes to pass through the body, lubricate tissue, digest food, and regulate body temperature. Given just how important it is, make sure that your cat always has plenty of fresh, clean drinking water available to her.