How long does a domestic white mouse live? - briefly
A pet white mouse usually lives between 1.5 and 2.5 years, though excellent nutrition and housing can extend lifespan to about three years.
How long does a domestic white mouse live? - in detail
Domestic white mice typically survive between 1.5 and 3 years under optimal conditions. Several variables influence this range:
- Genetic background – Albino strains such as BALB/c or C57BL/6 have documented median lifespans of 2.0–2.5 years; outbred pet lines may live slightly longer.
- Housing environment – Stable temperature (20‑24 °C), low humidity, and minimal noise reduce stress‑related mortality.
- Nutrition – Balanced rodent chow supplemented with occasional fresh vegetables prevents obesity and micronutrient deficiencies.
- Health care – Regular inspection for respiratory infections, tumors, and dental overgrowth, followed by prompt veterinary intervention, extends longevity.
- Social conditions – Single housing can increase anxiety, whereas small compatible groups promote natural behavior and improve survival rates.
Mortality peaks often occur in the first month due to neonatal fragility and in the third year from age‑related neoplasia. Proper cage sanitation, enrichment (nesting material, tunnels), and avoidance of predators (cats, larger rodents) further enhance lifespan.