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Facts about Guinea Pigs Life span | 4 to 5 years | Cage temperature range | 65°– 70° F | Relative humidity range | 40 to 70 | Breeding age | 3 to 4 months (male) | | 3 to 7 months (female) | Gestation period | 63 to 70 days | Litter size | 3 to 4 average, 1 to 6 range | Weaning age | 2 to 3 weeks |
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