20 March 2009

Rat Fast Facts

Life span: 2.5 - 3.5 years
Sexual maturity: 6 weeks
Breeding season: none
Type of estrus cycle: polyestrus
Duration of estrus cycle: 4 - 5 days
Duration of estrus: 9 - 20 hours
Type of ovulation: spontaneous
Length of gestation: 19 - 21 days
Eyes open: 12 - 14 days
Ears open: 12 - 14 days
Weaning age: 3 weeks
Average heart rate: 250 - 500 beats per minute
Average respiratory rate: 35 - 135 breaths per minute
Average rectal temperature: 101 - 103 degrees Fahrenheit
Optimal housing temperature: 65 - 75 degrees Fahrenheit
Protein content of diet needed: 16%

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