I am so sorry to haer of this;
If the first vet was negligent in the medical procedure, then that vet can be sued for malpractice. Generally, for negligence lawsuits, the damages typically awarded are the costs to repair/correct any damages caused by the negligence (ie the second surgery).
If the court finds that the doctor acted recklessly, they can also award punitive damages- these are designed to prevent such behavior in the future.
Some courts will allow pain and suffering for pets; California courts have allowed this in the past - for example please see the attached for a case where the plaintiff was awarded $39,000 due to veterinary malpractice.
Here is a link to locate an attorney:
Should you have further questions please post here to continue our dialogue. Otherwise,
kindly rate positively
as I am an individual contributor and rely on positive ratings to receive compensation for providing the requested information - this does not result in additional charges to the customer, but rather allows the site to credit my account a percentage to compensate me for my time.