t sound like a lawsuit would do what you want. You might instead post
a brief and straightforward account
of what happened
on Yelp or other review site, and also, you could talk to the veterinary licensing board and explain what happened and see if they tell you it was a wrongful death. They will probably investigate, and both that and your review will get the vet's attention at the very least. Be plain when telling the story, just explain the facts, don't let the tone be vindictive.