Keeping a gerbil healthy comes down to a handful of product categories: the right food, safe bedding, a properly sized enclosure, and enrichment items that support natural behaviors like burrowing, chewing, and grooming. Each of these plays a direct role in preventing the most common gerbil health problems, from respiratory infections to dental overgrowth to obesity.
Food and Nutritional Basics
Gerbils need a diet with at least 16% protein for healthy growth. Studies on weanling gerbils showed that diets with 12 to 14% protein produced noticeably slower weight gain compared to 16% or higher. Most commercial gerbil food mixes hit this mark, but check the label. A quality seed-and-pellet mix designed specifically for gerbils (not hamsters or mice) is the foundation of their diet.
Fat content in gerbil diets has ranged from 2 to 20% in research settings, and gerbils tolerate a fairly wide range. That said, seed-heavy diets can skew high in fat if your gerbil picks out sunflower seeds and leaves the rest. Pellet-based mixes or lab blocks help prevent this selective feeding. Small amounts of fresh vegetables, plain cooked egg, or mealworms can supplement protein, but the base mix should do most of the nutritional work.
Gerbils have a simple digestive system without a well-developed cecum, which means they’re naturally adapted to low-fiber foods like seeds rather than leafy roughage. Hay can still be offered for nesting and light foraging, but it isn’t a dietary staple the way it is for rabbits or guinea pigs.
Enclosure Size and Setup
The standard recommendation is 10 gallons of tank space per gerbil. Since gerbils should always be kept in pairs (they’re social animals that suffer when housed alone), a 20-gallon tank is the minimum starting point for two. Glass aquariums or “gerbilariums” work better than wire cages because they hold deep bedding without spilling it everywhere and protect against drafts.
A mesh or wire-topped lid is essential for ventilation. Fully enclosed plastic habitats with tubes may look fun, but they restrict airflow and can trap moisture and ammonia from urine, both of which contribute to respiratory problems.
Bedding That Protects Their Lungs
Bedding choice has a direct impact on respiratory health. The safest options are aspen shavings, kiln-dried pine, or paper-based bedding products like Carefresh or Kaytee Clean & Cozy. These materials are low in phenols, the naturally occurring chemicals in wood that cause the real damage.
Cedar and non-kiln-dried pine are the two materials to avoid completely. Softwoods like cedar and raw pine contain high concentrations of phenols that are toxic to rodent lung tissue and can cause liver damage over time. Kiln drying reduces phenol levels to what are considered safe thresholds, which is why kiln-dried pine gets a pass but raw pine does not. If the packaging doesn’t clearly state the wood species or that it’s been kiln-dried, skip it.
Depth matters as much as material. The RSPCA recommends 20 to 30 centimeters (roughly 8 to 12 inches) of bedding to allow gerbils to dig and construct stable tunnel systems. Burrowing is one of their strongest natural drives, and shallow bedding that collapses when they dig leads to stress and frustration. A mix of paper bedding and hay can help tunnels hold their shape better than loose shavings alone.
Chew Toys for Dental Health
Gerbil teeth grow continuously throughout their lives, and without enough to gnaw on, teeth can overgrow and cause pain, difficulty eating, and infections. Safe chew products include untreated hardwood blocks, willow sticks, apple wood, and cardboard tubes. Many gerbil owners find that plain cardboard (toilet paper rolls, small boxes) is one of the most enthusiastically destroyed items in the tank.
Avoid softwood chew toys unless they’re clearly labeled as kiln-dried. The same phenol concerns that apply to bedding apply to anything your gerbil puts in its mouth. Also steer clear of any chew products with dyes, glues, or added flavoring.
Exercise Wheels
A running wheel provides essential exercise, but the wrong wheel can cause serious injuries. Gerbils need a wheel in the 8-inch diameter range. Anything smaller forces them to arch their backs unnaturally while running, which can lead to spinal problems over time.
The wheel surface should be solid plastic or fine metal mesh. Open-rung wheels (the kind with bars like a ladder) are dangerous because gerbil tails and feet can slip between the rungs, leading to fractures or tail injuries. If you go with a metal mesh wheel, check carefully for sharp points where the mesh is welded to the frame. Solid plastic wheels like the Silent Spinner style are the safest mainstream option.
Sand Baths for Coat and Skin
Gerbils should never be bathed in water. Instead, they keep their fur and skin clean by rolling in sand, which scrubs away oil and dirt naturally. A shallow dish or specialized sand bath container filled with chinchilla sand works well. Offer it a few times a week for 15 to 20 minutes at a time, or leave it in the enclosure if your gerbils aren’t using it as a litter box.
The critical distinction here is sand versus dust. Products labeled as “chinchilla dust” or “bathing dust” are ground too fine and can irritate gerbil lungs when the particles become airborne. Look for sand with a slightly coarser, grainier texture. Volcanic or sepiolite-based sands marketed for chinchillas tend to be appropriate as long as the particle size isn’t powder-fine.
Water Bottles
An adult gerbil drinks only about 4 to 10 ml of water per day, which is remarkably little compared to other rodents. This low intake makes water quality especially important, because gerbils won’t flush out contaminants the way a heavier-drinking animal might. Inadequate water access can lead to weight loss, infertility, and eventually death.
A glass or BPA-free plastic water bottle with a sipper tube is the best delivery method. Bottles keep water clean and uncontaminated by bedding, unlike open bowls that quickly fill with substrate and droppings. Check the sipper tube daily to make sure it hasn’t clogged or developed an air lock. Because gerbils drink so little, it can be hard to notice a malfunction just by checking the water level.
Scent Gland Monitoring
This isn’t a product you buy, but it’s a health practice worth building into your routine. Gerbils have a visible scent gland on their belly, an oval, slightly oily patch of skin they use for marking territory. Scent gland tumors are one of the most common health issues in gerbils, particularly in older males. These tumors typically appear as firm masses or cystic nodules around 0.7 to 1.2 cm in diameter.
The concern isn’t just the tumor itself. Pain and irritation from an affected gland often lead to self-trauma, where the gerbil scratches or chews at the area repeatedly, causing bleeding and secondary infections. When you handle your gerbils, gently check the belly for any new lumps, swelling, hair loss, or redness around the gland. Catching changes early makes treatment far more straightforward.