Hamsters shouldn't go outside because Wasps can lay eggs inside of your hamster and then your hamster will Die when the wasp eggs grow inside of your hamster.
Another reason is because a bird could carry your hamster away (if the hamster is big then they can see it)
Also your hamster could run away or get squished by a car.
Another reason is because a bird could carry your hamster away (if the hamster is big then they can see it)
Also your hamster could run away or get squished by a car.