A canary can live perfectly well with just one foot!

However I really think that a trip to the vets would have been more apropriate than what she actually went though. Whether they normally treat birds or not I would have insisted on taking the bird down to them. If they still refused I would have told them I was reporting them for cruelty. As any vet is not supposed to refuse any animal in a serious condition/severe pain.

You should keep an eye out for septicemea now, as you have have performed surgery on her yourself.

I was always told (by an old school vet) that a sharp hard knock to the back of the head works to euthanise a bird, but I have always chosen to take mine to the vets, no matter what the time of day or night and whether the vet liked it or not!

I hope she survives.