As discussed earlier, mice usually use the moisture or water present in the food; so if the food is not available, they can live for some time. This is the only condition when the water is also not present along with the food. However, if some amount of water is available, they can survive for quite a long time.
If we talk about desert mice, then it is full of Mice and rats everywhere. Usually, the desert Mouse does not walk to find the water. They eat those insects and plants which contain the liquids. Also, they will find those insects which are nocturnal and stay out of the Sun.
Some people who kept the mouse as a pet put the water bottles in the cages because usually they give the packaged food to the mouse. As we all know, packaged food is completely dry and does not contain water. So, usually, the mouse will look for the water for drinking in that case.
If the food supply is available all the time, the mouse can live without water for months. Sometimes, they do not take a single drink of water for much time. This is such an amazing and astonishing thing which I know about a mouse.
If only water is present and food is not present around the mouse, it will certainly drink the water. So in the absence of food, when only water is available, it will drink the water to survive as survival is the only thing for any creature.
Baby mice are called pups, dependent on the mother’s milk in the first two weeks. They are getting the water from the milk of their mother. So their water needs are fulfilled by the mother’s milk. The pregnant mouse usually needs more water and food than normal conditions. So if the food and water availability is not there, then it is difficult to maintain the pregnancy.