How do I set up a cage for a pair of gerbils?
Provide at least 24in² of floor space per adult gerbil, which translates to a 10‑inch‑by‑12‑inch cage minimum. A stable temperature of 65–75°F (18–24°C) and 30–50% humidity keep them healthy for their 3–4‑year lifespan.
Space requirement
Each adult gerbil needs roughly 24in² of solid floor, so a pair requires at least 48in². A glass or acrylic cage measuring 12in×20in (24in² per gerbil) meets the minimum, and a height of 12in allows vertical tunnels without crowding. Aim for a total volume of about 5gallons, which is roughly 0.7ft³, to give room for bedding and enrichment.
Add a 2‑inch‑deep layer of deep‑burrowing substrate such as paper‑based bedding; gerbils will excavate tunnels up to 6in long. Provide a 1‑inch sand bath on one side so they can roll without getting wet. Keep the cage on a level surface away from direct sunlight or drafts that could swing temperature beyond the 65–75°F range.
Setup order
Start by selecting a cage with a secure latch and a mesh top that has ¼‑inch openings to prevent escape. Place the cage on a sturdy table, then set a digital thermometer and hygrometer to confirm the environment stays within 65–75°F and 30–50% humidity for at least 24hours before adding animals.
Next, spread the substrate, then add a shallow (½‑inch) sand bath in a corner. Insert a wooden hideout, a chew block, and a PVC tunnel that spans at least 6in. Finally, attach a sipper bottle that delivers 5‑10ml of water per day and a metal food dish holding ¼cup of seed mix. Run the cage for 48hours and observe that the water drips steadily and the sand stays dry.
Day‑one checklist
Before the gerbils arrive, verify temperature, humidity, and ventilation. Check that the water bottle releases 5ml per minute when tipped and that the food dish holds at least ¼cup of seed mix without spilling. Ensure the sand bath stays loose and the hideout is fully assembled.
When you place the pair inside, watch for immediate digging, grooming, and social sniffing. If any gerbil spends more than 10minutes in one corner, adjust the hideout placement or add another tunnel within the next 24hours.
- Thermometer reading 65–75°F (18–24°C)
- Hygrometer reading 30–50% humidity
- Water bottle delivering 5–10ml/day
- ¼cup seed mix plus fresh vegetable bits
- ½‑inch sand bath, 2‑inch substrate depth
- Two separate hideouts for each gerbil
When to upgrade
If you notice burrowing out of the cage, tunnel collapse, or the gerbils chewing the bars, it’s time to move to a 15‑in×24‑in (36in² per gerbil) enclosure within the next 2weeks. A larger cage also reduces stress when you add enrichment like a running wheel that spins at 5–7rpm.
Upgrade the substrate every 2weeks by replacing the bottom 1inch with fresh bedding to keep odor under 40dB and prevent mold. Increase the sand bath size to a 5‑gallon bucket if the gerbils start tracking sand onto the floor, which usually happens after 3–4months.
Setup mistakes that cause problems
Using wire flooring instead of solid base leads to foot injuries and reduces digging space; replace it with a solid floor covered by deep bedding. Choosing a cage under 10in×12in forces gerbils to compete for tunnels, often resulting in aggression after 4–6weeks.
Skipping the sand bath creates oily fur and skin irritation because gerbils cannot roll dry. Forgetting to monitor humidity can let it climb above 55%, encouraging fungal growth in the bedding. Correct each mistake within 48hours to avoid chronic health issues.
Keep reading about Gerbil: Gerbil care sheet
Related questions
How many square inches of floor space does each gerbil need?
Each adult gerbil needs about 24in² of solid floor; a same‑sex pair therefore requires at least 48in², which is met by a 12in×20in cage.
What temperature and humidity range is safe for gerbils?
Maintain 65–75°F (18–24°C) and keep humidity between 30% and 50%; use a hygrometer to check daily.
How often should I change the substrate?
Replace the bottom 1inch of bedding every 14days, or sooner if you notice strong odor or wet spots.
Not veterinary advice. This guide covers husbandry — housing, feeding, cleaning and handling. If your gerbil is injured, off food unusually long, or behaving abnormally, contact a veterinarian.