1. Chocolate: Chocolate contains theobromine, which is toxic to hamsters and can cause heart problems, seizures, and even death.
2. Alcohol: Alcohol is toxic to hamsters and can cause liver damage, respiratory depression, and even death.
3. Citrus Fruits: Citrus fruits, such as oranges, lemons, and grapefruits, are too acidic for hamsters and can cause digestive upset and diarrhea.
4. Avocado: Avocados contain persin, which is toxic to hamsters and can cause vomiting, diarrhea, and respiratory distress.
5. Rhubarb: Rhubarb contains oxalic acid, which is toxic to hamsters and can cause kidney damage and even death.
6. Raw Potatoes: Raw potatoes contain solanine, which is toxic to hamsters and can cause vomiting, diarrhea, and nervous system problems.
7. Coffee: Coffee contains caffeine, which is toxic to hamsters and can cause heart problems, seizures, and even death.
8. Fruit Seeds and Pits: Fruit seeds and pits, such as apple seeds and cherry pits, contain cyanide, which is toxic to hamsters and can cause vomiting, diarrhea, and even death.
9. Salt: Hamsters should not eat foods high in salt, as it can lead to dehydration and electrolyte imbalances.
10. Allium Family: Foods from the Allium family, such as onions, garlic, shallots, and chives, are toxic to hamsters and can cause digestive problems and even death.
11. Moldy Foods: Moldy foods can contain harmful bacteria and fungi that can make hamsters sick.
12. Dairy Products: Hamsters are lactose intolerant and cannot digest dairy products, which can cause digestive upset and diarrhea.
13. Human Junk Foods: Junk foods high in fat, sugar, and salt are unhealthy for hamsters and can lead to weight gain and health problems.
14. Raw Meat and Fish: Raw meat and fish can contain bacteria that can make hamsters sick.
15. Grapes & Raisins: Grapes can be toxic to hamsters, and their small size makes them a potential choking hazard.
16. Macadamia Nuts: Macadamia nuts are toxic to hamsters and can cause weakness, paralysis, and even death.
17. Sugar-Free Gum and Candy: Sugar-free gum and candy often contain xylitol, which is toxic to hamsters and can cause liver damage and even death.