Roborovski Hamster

Provide a minimum unbroken floor area of 100 x 50 cm (5,000 cm2); larger is better, and many experienced keepers treat 120 x 50 cm (6,000 cm2) as the practical target given the Robo's intense running drive. A glass or acrylic tank or a bin-style enclosure holds deep bedding far better than a barred cage and prevents escapes through gaps a Robo can slip through. Fill it with at least 20 cm of digging substrate (aim for 25 to 30 cm in part of the enclosure) using unscented paper-based bedding or dust-extracted aspen; add a sand bath (children's play sand or reptile sand, not calcium/dust sand) for the coat and natural digging. Essential furniture: a large SOLID-surface wheel (no rungs or mesh) at least 20 to 21 cm in diameter, ideally 24 to 27 cm, so the spine does not arch; multiple hides, wooden chews, cork bark, and cardboard/tunnels for tunnelling and cover.

Staple: a good-quality dry hamster/dwarf mix or pellet providing roughly 15 to 20% protein and 5 to 7% fat, offered daily. Supplement 2 to 3 times weekly with small amounts of washed fresh vegetables and herbs (romaine, cucumber, broccoli, bell pepper, carrot, parsley, coriander) and occasional low-sugar fruit (apple, pear, berries) as a treat. Add a little animal protein 1 to 3 times per week: a few mealworms, a small piece of cooked plain chicken, or plain boiled egg. Because Campbell's-line dwarfs are prone to diabetes and Robos can still gain weight, keep sugary and fatty items (sunflower seeds, peanuts, yoghurt drops) to tiny occasional amounts. AVOID entirely: chocolate, caffeine, alcohol, onion, garlic, chives, citrus fruit, avocado, rhubarb, raw/green potato, and any mouldy or spoiled food. Never offer fluffy 'cotton wool' nesting material, which can cause fatal gut blockage or limb entanglement if chewed.

Keep indoors, out of direct sunlight, in a stable, well-ventilated spot. Ideal ambient temperature 20 to 24 C; acceptable safe range 18 to 26 C with good airflow. Heat is the real danger for a desert animal in a warm climate: heat stress risk begins around 28 C and 30 C or above can be rapidly fatal, especially in an enclosed tank. On the cold side, keep the room reliably above about 15 C: because a Robo is the smallest dwarf and loses heat fastest, cold torpor (a false-hibernation state owners mistake for death) can set in once temperatures drop below roughly 15 C, sometimes after just a single cold night, and the risk deepens further as it approaches 10 to 12 C. Warm a torpid hamster slowly and seek a vet. Target moderate humidity around 40 to 60% (they are desert animals and do poorly in persistently damp air above 70%). No special UVB or heat lamp is needed; provide a normal day/night light cycle and never place the enclosure in a sunny window, which turns glass tanks into ovens.

Treat Roborovskis as solitary animals. They are the most pair-tolerant of the dwarf species, so a same-sex pair or sibling group raised together from birth can sometimes cohabit, but fighting, serious injury and stress are common as they mature, and rescues frequently take in Robos surrendered after cage-mate aggression. Never mix the sexes unless you intend to breed, and never house two adults who did not grow up together. If you do keep a pair, use a very large enclosure with duplicated resources (two wheels, multiple hides, several food and water points) and be ready to separate permanently at the first sign of chasing, squealing or wounds. For most owners, one hamster per enclosure is the safest and recommended choice.

Robos are driven runners and diggers, so enrichment centres on movement and foraging. Give a deep substrate they can burrow and tunnel through, plus sand areas for digging and dust-bathing. Scatter-feed the dry mix across the bedding instead of using a bowl so they forage naturally, and hide food inside cardboard tubes, egg-box pieces, walnut shells or paper parcels they must open. Rotate wooden chews, cork bark, seagrass tunnels, mineral/whimzee-style gnaws and safe climbing/hiding structures to keep the space novel. A large solid wheel is essential daily exercise, and a shallow sand bath doubles as play and coat care. Because they are so fast and flighty, let them explore a secure, escape-proof playpen at floor level rather than free-roaming a room.