Whether you own a hamster, gerbil, Guinea pig, mouse, pet rat, or even a chinchilla, your pet may be susceptible to heat stroke, vulnerable to sickness when exposed to drafts, and not happiest in abnormally high humidity levels. Conditions vary by species, and some small mammals are in fact quite sensitive to changes in their environment. A safe small mammal habitat requires relatively stable environmental conditions. Fluctuations or extreme changes can sicken or kill your pet, so monitoring and maintaining a safe environment is critical to a long, healthy life.
Fully research the needs of your small mammal, then maintain the correct conditions to keep them healthy. A commonly recommended room temperature range for small mammals is approximately 65-75 degrees Fahrenheit (18 to 24 degrees Celsius), with a humidity level of 40% to 60% RH, but always discuss your pet's needs with your veterinarian. If conditions are too humid, utilize a dehumidifier to reduce the moisture in the air. If the air is too dry (typically during cold months), use a humidifier to increase the indoor humidity level. To ensure stable conditions, closely monitor the temperature and humidity of the cage, and keep small mammals out of direct sunlight, and away from vents, fireplaces and other direct sources of heated or cooled air. Avoid drafty areas, or rooms that fluctuate with outdoor temperature changes, like garages and basements.