Hamster may have seizures at one time point in their lifetime. Seizures are not necessarily common in hamsters and other small pocket pets, but they can occur especially in the smaller dwarf breeds. Unlike other animals that have seizures, a hamster may not necessarily show outward symptoms like shakes or convulsions. Some hamster owners have reported abnormal behaviors like head tilting, walking in circles, having trouble walking, falling on his back, etc. You should call your vet if you see this happening in your hamster. Definitely monitor these symptoms and abnormalities and note when your hamster comes out of it.Some causes of seizures are unknown while other causes could be genetics or even a result of diabetes, brain injury, brain defects, poisoning, stroke, or even an inner ear infection. Inner ear infections, especially, can cause loss of balance and head tilting. Your vets Bend OR, Westside Pet Hospital can help you determine exact causes.