You measure the cage and wonder if it is big enough for your gerbils. Gerbils need more floor space than height because they are burrowing rodents that run and dig. A single gerbil pair requires a minimum of 20 gallons of floor area, but bigger is always better.
Our editorial team emphasizes that gerbils are active, social animals that thrive in groups. They need room for tunnels, a deep substrate, and separate areas for sleeping, eating, and toileting. Cramped cages cause stress and fighting.
Minimum Cage Size for a Pair of Gerbils
For two gerbils, the absolute minimum floor space is 10 gallons per gerbil, meaning a 20 gallon long tank or equivalent. The cage should be at least 30 inches long and 12 inches deep. Gerbils are horizontal movers, so a long, low cage is better than a tall, narrow one.
Height is less critical but should be at least 12 inches to allow for a deep layer of bedding (8 to 10 inches for burrowing) and a safe fall distance. Wire cages with multiple levels can work if the bars are close together (no more than half an inch apart) and the floor is solid to prevent foot injuries. However, glass or plastic tanks are preferred for burrowing.
Our editorial team recommends that any cage must be escape proof. Gerbils are excellent jumpers and chewers. A secure mesh lid is essential for tanks.
Why Floor Space Matters for Gerbils
Gerbils are naturally active and cover large distances in the wild. In captivity, insufficient floor space leads to obesity, boredom, and aggression. A larger cage allows for a more complex layout with tunnels, hides, and exercise areas.
Gerbils are burrowing animals. They need a deep substrate, at least 8 to 10 inches, to dig tunnels. This requires a cage with a high base or a tank. Shallow bedding prevents natural behavior and can cause stress.
A good rule is to provide the largest cage you can fit and afford. Many owners use 40 gallon breeder tanks for a pair, which offers ample space for enrichment and a stable social group.
Cage Setup for Gerbil Behavior and Health
Gerbils are social and must be kept in same sex pairs or groups. A proper cage setup includes multiple hides, a solid exercise wheel (at least 8 inches in diameter), and chew toys. The bedding should be dust free paper or aspen, not cedar or pine which can cause respiratory issues.
Provide a sand bath for grooming. Gerbils do not bathe in water. A shallow dish with chinchilla sand helps keep their coat clean and reduces odor. The cage should have a separate area for food and water, preferably a heavy ceramic bowl and a sipper bottle.
Regular cleaning is necessary. Spot clean daily and do a full change of bedding every 2 to 4 weeks, depending on the size of the cage and number of gerbils. Never mix gerbils from different litters without proper introduction, as this can lead to fighting.
Common Mistakes in Gerbil Cage Size
One common mistake is using a cage that is too small or tall. Critter trails and small wire cages are not suitable for gerbils. They need horizontal space, not vertical. Another mistake is not providing enough bedding depth. Gerbils need at least 8 inches to dig, otherwise they become stressed and may develop health issues.
Owners sometimes overcrowd the cage with too many gerbils. A pair or trio in a large cage is ideal. More gerbils require even more space. Also, avoid placing the cage in direct sunlight or drafty areas. Gerbils are sensitive to temperature extremes.
Finally, remember that gerbils chew constantly. Plastic cages are quickly destroyed. Choose glass tanks, metal cages with solid floors, or DIY bin cages made from sturdy plastic. The cage must be secure and well ventilated.