Merck Manual

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Guinea Pigs at a Glance

Guinea Pigs at a Glance

Life span

6 to 8 years

Weight

30 to 35 ounces (850 to 1000 g)

Length

8 to 19 inches (20 to 50 cm)

Normal body temperature

102°F to 104°F (39°C to 40°C)

Heart rate

250 beats per minute

Estrus cycle

13 to 25 days

Duration of pregnancy

59 to 72 days

Litter size

1 to 7 (usually 3)

Weaning age

3 weeks

Environmental requirements

65°F to 75°F