A mouse can survive for about 2 to 4 days without water and around 2 weeks without food, although these time frames can vary based on several factors, including the mouse's age, health, and environment.
Without water, mice tend to become dehydrated quickly because they have a high metabolic rate and small body size. Dehydration can lead to organ failure and death within a short period. If a mouse is deprived of food, it will initially use stored fat and glycogen for energy, allowing it to survive for a longer duration. Eventually, though, a lack of food leads to starvation, weakening the mouse's immune system and overall health.
Environmental conditions play a significant role in these survival times. Warmer environments can accelerate dehydration, while cooler temperatures may help conserve energy and moisture. Providing the right balance of food and water is crucial for the health and longevity of a mouse, whether kept as a pet or observed in the wild.