Put the Campbell's Straight Into a Finished Cage and Leave Her Alone
A Campbell's dwarf hamster settles by scent and darkness, not by being passed around on adoption day. Set the travel box inside the completed cage, open it, and let her walk out into deep bedding when the room is quiet, ideally toward evening when she would naturally wake. She will likely pouch food, dig a corner burrow and vanish for hours, which is normal settling rather than rejection. Keep lights low, television volume down and other pets out of the room, because a cat staring through the bars on night one teaches her the new home is hunted territory.
Set Up the Campbell's Cage for Burrowing, Not Climbing
A Campbell's cage needs a solid floor packed with deep, unscented paper bedding she can tunnel through, a solid-surface wheel sized so her back stays flat, and a sand bath for her dense coat. Place a small house with no floor over the bedding so she can extend the burrow underneath it, and scatter part of her seed mix through the top layer so foraging replaces bowl-watching. Keep the cage away from direct sun, drafts and bedroom doors that slam, and avoid lofty multi-level layouts because this dwarf is a poor climber who falls heavily for her size. A water bottle plus a tiny backup dish guards against a stuck bottle ball leaving her without a drink overnight.
Feed Lightly and Watch the Pouches, Not the Clock
A Campbell's dwarf hamster will stuff her cheek pouches within minutes of finding food, so an empty-looking bowl does not mean she has eaten nothing. Offer the same mix she had before adoption, keep fresh water available, and hold back sugary treats entirely during the first week, since Campbell's are prone to blood-sugar problems and rich snacks are a poor welcome. Look for activity at dusk, a used wheel in the morning and bedding pushed into new mounds as signs she is exploring. If she has not emerged, drunk or carried food for a full day and night, or she feels cold and wobbly when she does appear, contact a veterinarian who sees small mammals promptly.
Tame a Campbell's With Scent and Still Hands
Campbell's dwarfs often nip first and investigate second when a hand arrives smelling unfamiliar. Begin by rubbing your clean hands in her used bedding corner, sitting beside the cage at her waking time, and dropping a seed just inside the door before withdrawing. After several evenings, rest a flat palm on the bedding with a treat on it and let her step on, lift nothing, and repeat until she sits to eat there. Scoop her in a cup for cage cleaning rather than grabbing from above, and keep sessions to a few minutes so she returns to the burrow still calm rather than exhausted by attention.
Keep One Campbell's Routine for Everyone in the House
A Campbell's dwarf hamster kept as a single pet avoids the sudden cage-mate fights this species is known for, so do not add a companion as a settling aid. Write down her waking window, the agreed no-waking rule for daytime sleep, and who refreshes water, then expand handling only when she approaches the door awake and unhurried. Sudden squeaking fights are impossible with one hamster, but bar-chewing, frantic wall-climbing or a wet tail area all signal stress or illness that deserves a prompt check and a quieter cage position. Recording those observations in KinsLe Family Sharing lets everyone caring for this Campbell's spot a change in her nights without disturbing her days.