Additional food is fruits, vegetables, boiled eggs (not often), chicken meat cooked (also not often). Meat and eggs are needed as a source of protein (especially for pregnant women). It’s also good to give low-fat cottage cheese, low-fat yogurt. I sometimes buy my cottage cheese “Theme”.
Fruits and vegetables are vitamins and moisture. There are vegetables in the stern, but in dried form.
As hamsters like porridge, boiled on water, especially semolina and buckwheat. You can simply grate the grains in water, do not cook. Of course, grass is a favorite food: leaves of plantain, dandelion, clover, sprouted oats, salad.