Gerbil Care: A Practical Guide
Mongolian gerbils are desert rodents built for arid life: in the wild they eat green vegetation, seeds, roots, bulbs, cereals, fruits, and insects, and they hoard food rather than relying on coprophagy. That desert heritage shapes two of their most common problems.
The Humidity Rule
Gerbils are exquisitely sensitive to humidity. Nasal dermatitis — a sore, crusted muzzle — is strongly associated with relative humidity above about 50% and with wet, soiled bedding. Keep the cage dry, change bedding often, and skip the damp corner of a poorly ventilated room. This single change prevents a large share of gerbil skin problems.
Diet
A commercial gerbil mix formulated for low fat and modest protein suits them better than a rat/mouse block. Obesity creeps in easily; about 10% of gerbils on standard rodent diet become obese.
Health Watch
- Tyzzer disease — a sudden, often fatal enteritis in gerbils 3–10 weeks old, favored by stress and overcrowding.
- Epileptic seizures — gerbils have a well-described inherited seizure predisposition; a brief freeze and collapse is the classic picture, usually harmless but worth distinguishing from true illness.
- Neoplasia — tumors are common in older gerbils, reported in roughly a quarter to 40% of aged animals.
- Antibiotic caution — like many rodents, gerbils are vulnerable to antibiotic-associated gut disruption; penicillin-type drugs are a known hazard.
Stable humidity, dry bedding, and a calm, uncrowded setup address most of what goes wrong.