The foods a Chinese hamster should never get
Citrus fruit such as orange, lemon, and grapefruit is too acidic for a Chinese hamster, and onion, garlic, and raw potato can damage her health even in small nibbles. Chocolate, candy, biscuits, and other sugary human foods are unsafe as well, and they carry an extra risk for this species: Chinese hamsters are prone to blood-sugar trouble, so sweet treats that might seem harmless for a larger hamster can unsettle a Chinese hamster much sooner.
Also keep out rhubarb, bitter baking almonds, raw kidney beans, salty or roasted-and-seasoned nuts and seeds, fried food, and anything with added sauces or spices. If an ingredient list is long and made for people, the food does not belong in her enclosure.
Why sticky and pouchable foods are a special problem
A Chinese hamster stuffs food into her cheek pouches and carries it to a hoard, so texture matters as much as ingredients. Sticky foods such as peanut butter in a lump, soft caramel, or gummy sweets can cling inside a pouch and be hard for her to clear, which can irritate or injure the pouch lining. Hard, sharp-edged snack pieces can also scrape a pouch as she packs them in.
Feed treats in the open rather than leaving them for her to pouch, and check her hoard area during cage cleaning. Hoarded fresh food that has gone soft or moldy should be removed and replaced with dry, safe staples, because she will return to that store later and eat without inspecting it.
The sweet-fruit trap for this species
Because Chinese hamsters develop blood-sugar problems readily, the unsafe list in practice is wider than the outright toxic items. Large or frequent servings of banana, grape, mango, dried fruit, and honey-based treat sticks can push her diet in the wrong direction even though none of them is a poison. Keep fruit to a rare, fingernail-sized piece, favor vegetables such as broccoli, cucumber, and small amounts of cooked plain egg or mealworm for variety, and never use yogurt drops or honey sticks marketed as hamster candy.
Watch for a hamster who suddenly drinks and urinates much more, loses weight while eating eagerly, or becomes unusually tired. Those changes deserve a vet visit for their own sake, and they are also a reason to strip the diet back to her plain staple mix and safe vegetables while you wait to be seen.
What to do if she eats something unsafe
If you see her pouch or eat citrus, chocolate, onion, or another item from the unsafe list, remove the rest of it calmly, note what it was and roughly how much she took, and call a vet for advice rather than trying home remedies. Do not wait for symptoms with chocolate or onion-family foods. Keep the packaging if the food came from a packet, since the ingredients help the vet judge the risk for such a small animal.
A short written unsafe list on the enclosure, shared with anyone who feeds her, prevents most accidents, and KinsLe Care Teams keeps that list in one place by letting you assign feeding jobs with the safe treats named and the risky foods ruled out.