Can hamsters eat onion?
Quick verdict
Unsafe
Key risk
Toxic and can cause blood disorders and digestive upset.
Why
Never give onion to hamsters.
Can hamsters eat onion, and why?
Never give onion to hamsters. Toxic and can cause blood disorders and digestive upset.
Hamsters are omnivores who do best on a complete hamster mix, with small amounts of fresh food as treats. They are tiny and prone to obesity and diabetes (especially dwarf hamsters), with sensitive tummies, so portions must be minimal and sugary or watery foods limited.
Warning — what to watch for
Toxic and can cause blood disorders and digestive upset.
If your hamster has eaten onion, don’t wait for symptoms — contact your vet immediately, or call the Animal PoisonLine on 01202 509000 (24/7, UK). Signs of a problem can include vomiting, diarrhoea, drooling, lethargy, tremors or loss of appetite.
More foods hamsters might eat
Make treat time better
Handy kit for feeding hamsters well:
Frequently asked questions
Can hamsters eat onion?
Unsafe. Never give onion to hamsters.
What happens if my hamster eats onion?
Toxic and can cause blood disorders and digestive upset. If your hamster has eaten onion, contact your vet or the Animal PoisonLine (01202 509000) straight away — don’t wait for symptoms.
Is onion poisonous to hamsters?
Unsafe. Never give onion to hamsters.
Check onion for another pet