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Average body weight
Male: 400–600 g; Female: 300–400g
Life span
Average 4–6 yr, may live to 8 yr
Body temperature
95.7°–98.6°F (35.4°–37.0°C)
Adult dental formula
2 (I 3/2:C 1/1:P 3/2:M 3/3) = 36 (variations have been noted)
GI transit time
12–16 hr
Heart rate
180–280 bpm
Respiratory rate
25–50 bpm
Age at sexual maturity
2–3 mo
Reproductive life span
Male: throughout life
Female: 2–3 yr
Gestation
34–37 days
Litter size
3–4 (range 1–9)
Birth weight
10–18 g
Eyes open
14–18 days
Deciduous teeth eruption
Begins on day 18; all deciduous teeth erupted by 9 wk
Permanent teeth eruption
Begins at 7–9 wk
Age at weaning
5–6 wk (start eating solids at 3 wk)
