There is always a risk when you give a general anethetic to a small animal. You will have have signed a waiver before the operation absolving the vet of blame should the animal die due to the anethestic. If however the vet was negligent in administering the operation and that caused the death than thats another matter, however i would think that would be hard to prove without getting another independant vet to do an autopsy!
See my post above
