If swallowed whole and alive, they wouldn’t die instantly. Stomach acid would need some time to digest it, and in that time it would be able to gnaw its way out of the guy’s stomach.

And if so, would it chew its way out? – Quora. A mouse would have to be very small to be swallowed. Once in the stomach it’s live and death would be horrible. It would drown in digestive juices and dissolve into digestively acceptable liquid.

The large intestine is up to 14 cm long in mice and 105 cm in humans and can be divided into the cecum and colon. The cecum of mice is relatively large, being 3–4 cm in length, and functions as a microbial fermentation vessel, while in humans it is 6 cm and of minor importance.

Maybe. See, the human throat is totally big enough to swallow a mouse, i.e. you wouldn’t choke. But mice have claws, and they don’t like being swallowed.

Pachyuromys duprasi: 5 – 7 years

Mice in laboratories have lived much longer than wild mice with some studies recording normal mice living up to 4 years. Mutated mice bred in captivity have lived beyond four years with the longest life of a mouse being record at just short of 5 years.

If a mouse or several mice have found their way inside, they will come and go freely, but it is unlikely that they will ever move their nests back outside, even in springtime when the weather warms up. If mice are cozy in their nests and have plenty of food and water in your home, they will not want to leave.

Under furniture or inside upholstered furniture voids. In secluded corners of cluttered rooms, garages or attics. Inside stored cardboard boxes. Voids in walls or ceilings, usually near heat sources.

Mice are much more dependent upon food than water. They can only go 2-4 days without food of some sort. Keep in mind that this does not mean they need to sit down to a full fest.

Mice know what we smell like. If they smell us on, or around, a trap, they will avoid that trap. Mice also use their sense of smell to detect threats in another way. If they smell dead mice left in traps, they will avoid those areas, sensing that death may wait for them in those locations.