Can Hamsters eat ...?
Food safety index

Plain, cooked potato flesh is generally tolerable for hamsters in very small amounts, but the starchy, high-carbohydrate content makes regular feeding a genuine risk for obesity and diabetes — conditions to which hamsters are especially prone. Raw potato, green-tinged skin, and any part of the plant that has sprouted contains solanine, a glycoalkaloid that is genuinely toxic to small mammals. Overall, potatoes sit firmly in the 'caution' zone: occasional tiny portions of cooked, peeled white potato are unlikely to cause harm, but they offer little nutritional benefit and carry meaningful risks if fed poorly.

Kale is not toxic to hamsters, but its high oxalate content, goitrogenic compounds, and calcium-to-phosphorus ratio make it a food to offer only sparingly and infrequently. A tiny leaf shred once or twice a week is unlikely to cause harm, but daily feeding can contribute to bladder sludge, thyroid disruption, and digestive upset in these small animals. Owners who want to add leafy greens to a hamster's diet should view kale as an occasional treat rather than a dietary staple.