A widely kept Russian dwarf available in dozens of coat colors; it does not turn white in winter and, like its relatives, is diabetes-prone and best housed alone in captivity.
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Central and East Asia (steppes of Mongolia, northern China, Russia, Kazakhstan)
Origin
Old World
Climate
🍂 Temperate
Family
Cricetidae
Genus
Phodopus
Part of the Hamsters
Small burrowing rodents of the family Cricetidae kept as popular starter pets, ranging from the larger solitary Syrian to the tiny, fast Phodopus dwarfs. They share a love of digging, wheel-running, cheek-pouch hoarding, and crepuscular activity.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Photo coming soon
Minimum
Continuous floor enclosure
≈ 360 sq in (≈ 80 × 45 cm) continuous
Dwarf hamsters are still hamsters — they burrow, hoard, and patrol. Provide one continuous floor area (no tube-connected compartments) with 15+ cm of bedding for tunnelling. Campbell's are the most social dwarf — same-litter sibling pairs sometimes work, but split immediately at the first sign of fighting.
Photo coming soon
Recommended
Larger tank or bin cage
≈ 450 sq in + 20 cm bedding depth
A 100 × 50 cm glass tank or bin cage with deep bedding, a solid wheel (≥ 21 cm for dwarfs, ≥ 28 cm for Chinese), sand bath, hides, and chews lets a dwarf express natural burrowing and foraging.
Photo coming soon
Ideal
Bioactive-style enclosure
600+ sq in with deep substrate zones
Oversized enclosure with multi-chamber burrowing depth (25 cm+), varied substrate, foraging clutter, and a generous wheel. Closest to wild ranging behaviour and best for stress-related vices.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Newborn
Newborn mammals are nursed on their mother's milk. Many are born helpless — blind, deaf, and sparsely furred (altricial, as in dogs, cats, and rodents) — while others stand and follow within hours (precocial, as in hoofed livestock).
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Juvenile
After weaning, juveniles grow quickly and become increasingly active, playful, and independent. Adult coat, proportions, and (in many species) the permanent teeth come in as they approach full size.
Photo coming soon
Adult
Adults reach full body size and sexual maturity, with the species' mature coat and build. Sexual dimorphism — differences in size, mane, horns, or markings — is pronounced in some mammals and subtle in others.
Senior
Senior animals show aging signs such as graying fur, reduced activity, and a greater need for veterinary monitoring of joints, teeth, and organ function. Lifespan and the onset of old age vary widely by species and size.
Color & pattern variants
Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.
Provide the largest enclosure you can, with a minimum of ~100 x 50 cm (4,000 cm2 / 620 sq in) of continuous floor space. Because dwarfs can squeeze through cage bars and chew through plastic, a glass tank, deep tub, or bar-free enclosure with a secure lid is best. Fill it with a deep (20-30 cm+) layer of paper or aspen substrate for tunneling, plus a large solid-surface wheel (20 cm or larger), multiple hides, a sand bath, and forage/chew opportunities.
Keep them at a steady room temperature of about 18-24 C, away from drafts, damp, and direct sunlight. Campbell's come from the steppes and semi-deserts of Central and East Asia; unlike the closely related winter white, they retain a grey coat year-round and do not molt to white in short daylight. No UVB or special humidity control is needed.
Substrate
Provide a deep (20cm+ minimum) layer of unscented paper-based or aspen bedding so they can build extensive tunnels, which is essential for welfare. Avoid cedar, pine, and cotton-wool fluff bedding, which causes respiratory irritation and impaction. A sand bath area with chinchilla-grade dust-free sand keeps their coat clean.
Equipment & setup
House in a large enclosure (minimum ~75x40cm floor, larger is better) with a solid running wheel of at least 20cm diameter to prevent spinal curvature. Keep at stable room temperature (20-24C), away from drafts and direct sun, with multiple hides and chew items. Provide an unsalted seed/grain mix supplemented with occasional protein like mealworms.
Diet
Feed a quality dwarf-hamster grain and seed mix as the staple, with occasional protein (a mealworm, plain cooked egg, or dried insect) and small amounts of safe fresh vegetables. Campbell's are particularly prone to diabetes, so the diet must be kept low in sugar: avoid fruit, sugary mixes, corn, and yogurt/honey treats.
Scatter-feed across the substrate to encourage foraging, supply constant fresh water, and provide safe wood and chews for dental wear. Monitor body condition, as obesity is common on rich diets.
Behavior & temperament
Campbell's are nocturnal/crepuscular, busy, and inquisitive. With patient, gentle handling many become reasonably tame, though they can be nippier than winter whites if startled or improperly socialized. They are enthusiastic diggers, hoarders, and runners that thrive with deep substrate, tunnels, a wheel, and rotating foraging enrichment.
They are frequently sold as social pets, but in captivity same-sex pairs and groups commonly escalate into serious fighting as they mature, so solo housing is the welfare-safe default. They hybridize readily with winter whites; such hybrids are common in the trade and should not be bred.
Health
Diabetes is especially prevalent in Campbell's; watch for excessive thirst and urination, weight loss, lethargy, and cataracts, and prevent it with a strict low-sugar diet. Other frequent problems include obesity, dental overgrowth, wet tail/diarrhea from stress or poor hygiene, skin tumors with age, and bite wounds when cohoused.
Keep the habitat dry and clean, track weight and water consumption, and consult an exotics-experienced vet for any signs of illness. Because they hide sickness as prey animals, subtle changes in appetite or activity should be taken seriously.
Tips, DIY & hacks
Campbell's are prone to diabetes, so avoid sugary fruit and fructose-heavy treats and offer a low-sugar diet. DIY enrichment with cardboard tubes, scatter-fed seed, and dig boxes filled with extra substrate keeps them active. Unlike Syrians they can sometimes live in same-sex pairs from young, but watch closely and separate at the first sign of fighting.
