Gerbil Care Guide: Habitat, Diet, and Why They Can’t Live Alone
My kids picked gerbils over a hamster because “they’re not asleep all day.” Fair point. Gerbils are up and active while everyone’s home, which makes them a genuinely good fit for a family.
Here’s everything that goes into keeping them well, including the one rule people break most often.
This guide covers the common Mongolian gerbil specifically; if you’ve come across a duprasi, or fat-tail gerbil, that’s a different species with its own rules, covered in our fat-tail gerbil care guide.
Gerbil Quick Facts
| Fact | Detail |
|---|---|
| Common species | Mongolian gerbil |
| Lifespan | 3 to 5 years |
| Adult size | About 4 inches, not counting the tail |
| Activity pattern | Crepuscular (active dawn and dusk, not nocturnal) |
| Minimum habitat | 40-gallon tank for a pair |
| Purchase price | $10 to $30 |
Housing: Why a Tank Beats a Cage
Bottom line: skip the wire cage. Gerbils are natural diggers, and wire-bottom cages interfere with that instinct while potentially causing injuries.
A 40-gallon aquarium or terrarium with a secure, well-ventilated mesh lid is a good starting point for a pair of gerbils. Some owners go a step further with a glass display cabinet, such as an IKEA Detolf, laid on its side with a custom lid. This provides even more room for digging and exploring.
Why Wire and Plastic Cages Are a Bad Choice
- Wire flooring: Gerbils may try to dig through the wire, injuring their teeth, feet, or noses in the process.
- Plastic enclosures: Gerbils can chew through plastic, and swallowed pieces may cause a dangerous intestinal blockage.
Keep the tank away from cold drafts, direct sunlight, and loud noises. The room temperature should also stay below 80°F (26°C). Otherwise, gerbils generally tolerate normal household temperatures.
Essential Gerbil Housing Checklist
- A 40-gallon (or larger) tank with a secure mesh lid
- A deep layer of digging-friendly bedding
- At least one hideout per gerbil
- A solid-surface exercise wheel, never a wire one
- Chew-safe toys and cardboard
Bedding and Enrichment
Gerbils need several inches of paper-based bedding or shredded paper so they can burrow properly. The bedding should be deep enough for digging, rather than simply covering the floor. Avoid wood shavings, especially cedar and pine, because they can irritate a gerbil’s skin and respiratory system.
Cardboard provides inexpensive entertainment and encourages natural chewing behavior. Toilet paper rolls, egg cartons, and cereal boxes can all become favorite toys. This is useful because a gerbil’s front teeth never stop growing and need regular wear.
Dust Baths and Chewing Activities
Offer a shallow dust bath once a week using chinchilla-safe sand. Remove it after 30 minutes to an hour. Leaving it inside the tank longer can turn it into an extra source of mess.
You can also rotate cardboard toys and other chew-safe enrichment items to keep the enclosure interesting.
Why Gerbils Should Never Live Alone
Here’s the part that trips up more new owners than anything else: a lone gerbil is a stressed gerbil. Gerbils are deeply social animals, and enthusiasts use the word “clan” to describe a bonded group.
Choosing the Right Gerbil Pair
Get two gerbils of the same sex, ideally from the same litter, and bring them home together around 5 to 6 weeks old. Bonding is generally easier when they grow up together.
Introducing two unfamiliar adult gerbils later in life is riskier. It often requires the split-cage method, which keeps them in adjoining spaces separated by a mesh divider. They can see and smell each other safely before sharing the same enclosure.
Preventing Fighting and Unplanned Litters
Watch your pair for genuine aggression, rather than ordinary rough play. Separate them if fighting becomes serious.
Never house a male and female together unless you are intentionally breeding them. Gerbils reproduce quickly, and females can have close to a dozen litters a year. An unplanned mixed-sex pair can lead to more gerbils than you expected.
If a litter does happen, separate the babies by sex around 8 weeks old, before they become old enough to reproduce.
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Diet: What Gerbils Eat
A high-quality gerbil pellet should make up most of the diet and remain available at all times. Gerbils are omnivores, so small amounts of vegetables, fruit, and the occasional mealworm can provide variety.
Keep these extras to around 10 percent of their overall food intake.
Why Loose Seed Mixes Shouldn’t Be the Main Diet
Avoid relying on loose seed mixes as the primary food. Gerbils may pick out their favorite pieces and leave the rest, potentially missing important nutrients even when the package is labeled “complete.”
Water and Foods to Avoid
Use a water bottle instead of an open dish. Gerbils dig constantly, and bedding can quickly turn a water dish into a soggy mess.
Never offer chocolate, caffeine, or alcohol. These substances are toxic to gerbils. Also, remove leftover fresh food after about 10 hours to prevent spoilage.
Handling and Behavior
Gerbils communicate more than many new owners expect. Watch for quick winks, soft purring when they are content, hind-leg thumping when startled, and nose-to-nose greetings between cagemates.
How to Pick Up a Gerbil Safely
Scoop a gerbil up with cupped hands rather than grabbing it from above. Let it settle before moving around too much.
Never pick up a gerbil by its tail. The skin can tear or slip off entirely, causing an injury that will not heal back to its original appearance.
Activity Levels and Exercise Wheels
Gerbils are crepuscular, meaning they are most active around dawn and dusk. Do not expect the same nighttime wheel-running routine commonly associated with hamsters.
When choosing an exercise wheel, make sure your gerbil’s back stays relatively flat while running. If its body curves into a tight U-shape, the wheel may be too small and could strain its spine over time.
Always supervise children during handling. Gerbils move quickly, and a startled animal can jump farther than expected.
Health: What to Watch For
Book an annual veterinary checkup and monitor your gerbil between visits. A healthy gerbil should generally have:
- Bright, clear eyes
- A clean nose and ears
- A smooth, shiny coat
- Normal, well-formed droppings
- A steady, healthy weight
Gerbils are prey animals by instinct, so they often hide signs of illness until a problem becomes more advanced. Watch closely for changes in eating habits, energy levels, or behavior.
Common Gerbil Health Problems
Health issues seen in gerbils include:
- Tooth overgrowth: Their front teeth grow continuously and can develop problems if they do not wear down properly.
- Mites: These parasites can cause skin irritation and discomfort.
- Nasal irritation: Environmental irritants can affect the nose and respiratory system.
- Tail injuries: Rough handling or grabbing the tail can cause serious damage.
- Seizures: These occur in gerbils more often than in many other small pets.
Understanding Tail Slip
Pay particular attention to the tail because gerbils are prone to a condition called tail slip. This happens when the skin slides off after the tail is grabbed or caught.
The damaged skin does not grow back to its original appearance. Prevention is therefore essential: never lift a gerbil by its tail, and make sure children understand this rule before handling one.
How Much Does a Gerbil Cost?
Gerbils themselves are relatively inexpensive, typically costing $10 to $30 each. Since they should live in compatible pairs, plan to buy two from the beginning.
The initial enclosure usually costs more than the animals. A 40-gallon tank, secure mesh lid, exercise wheel, and bedding can bring the initial setup cost to approximately $100 to $200.
After the enclosure is ready, ongoing expenses are generally modest. Food, bedding, and occasional veterinary visits make up most of the regular costs.
