Normal Values & Characteristics of Small Mammals


The following table provides information on the life span, weight, reproduction, and normal physiologic values of various small mammals often kept as pets. Most of the values are given in ranges, and depending upon the source, you may find somewhat different ranges provided elsewhere. Numbers may differ since information gathered from various breeds, species, and husbandry practices can affect the values.


  Life Expectancy Average Weight (grams*)
 F=female  
M=male		 Length of Pregnancy (days) Litter Size Weaning Age Recommended Environmental Temperature (ºF) Heart Rate
(beats per minute)		 Respiratory Rate
(breaths per minute)
Chinchillas 8-10 years F 550-800;
M 450-600		 105-118,
average 111		 1-6,
usual 2-3		 6-8 weeks 50-75 100-150 40-80
Gerbils 3-4 years F 50-75,
M 50-120		 23-26 3-7 21-30 days 65-75 260-500 85-140
Guinea Pigs 5-6 years F 700-900,
M 900-1200		 59-72, average 68 1-10,
usual 2-4		 3-4 weeks 60-85 240-400 50-130
Hamsters 18-30 mos F 95-125,
M 85-120		 15-17 5-10 20-25 days 70-75 275-480 50-100
Hedgehogs 5-7 years 300-1500, depends on species 34-38 1-7,
usual 3-4		 4-6 weeks 70-80 120-170 50-110
Mice 12-36 mos F 30-60,
M 38-60		 19-21 9-12 18-28 days 70-77 400-750 80-220
Rabbits 6-11 years, depends on breed 2-8 kg 30-33 4-10 5-8 weeks 40-80; never over 85 150-300 30-60
Rats 26-48 mos F 225-325,
M 275-500		 21-23 8-12 4 weeks 70-75 300-550 60-120
Sugar Gliders 8-10 years F 100-135,
M 120-160		 16 days, then move into pouch; emerge from pouch after 60-70 days 1-2 110-115 days 70-80 250-325 30-60
* There are 453 gms (grams) in a pound. A kilogram (kg) is 1000 gms.


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