How exactly is this breeder demanding money from you when you already paid for your rabbit?
First off, DO NOT DO IT! DO NOT GIVE THEM ANY FORM OF PAYMENT. Also, do not give them any personal information if you haven't already, such as your full name, and especially your address. You need to speak to the police first. It sounds like this person is trying to pull a scam on you. If you aren't an adult but under 18, if you haven't already, you need to inform your parent(s) or legal guardian about what is going on with this breeder.
What I would suggest doing is keep any written communications or verbal messages this breeder has left or sent to you, particularly anything that has them verbalizing this threat and scam they are trying to pull. And write down and document everything that has happened so far with this person. How and when payment was made for your rabbit, everything you can remember that this person has said to you. And from now on I would keep all communication with them through email or text so you have a written record of everything they have said to you.
Depending on what they are saying exactly, this may not just be considered a scam but could amount to fraud, harassment, or even blackmail. You need to contact your local police department and talk to them about the threats that have been made against you and file charges against this person, if the police determine this is the appropriate course of action
As for the fasting, ANYONE telling you to fast your rabbit doesn't know what they are talking about.
Rabbits should NEVER be fasted, prior to surgery or anytime. Rabbits always need to be eating and have food moving through their digestive tract. A rabbit should never go more than 12-24 hours without eating an adequate amount of food or it's considered an emergency, because they become at risk of GI stasis and a potential gut blockage setting in from the digestive slowdown. In addition to these reasons, the primary reason a rabbit shouldn't and doesn't need to be fasted, is because they have no gag reflex and cannot vomit. Meaning, there's no need to fast rabbits, and because of the effect it can have on their gut function, it is actually considered harmful to do.
If the actual vet told you to fast your rabbit, then this vet isn't an exotics or experienced rabbit vet and should not be performing or treating rabbits at all. More commonly though, is that the receptionist is the one giving out these instructions because they haven't been properly informed of pre surgical instructions for rabbits, and so gives the standard instructions used for cats and dogs. This is still a huge and dangerous mistake on the vets part, one which they are still responsible for.
As for the vet, any knowledgeable rabbit vet knows a rabbit should never be fasted. In handling this issue, I would call their office and demand to talk to the person that runs the vet clinic(office manager) and file a complaint. If the receptionist or vet told you to fast your rabbit, you shouldn't be held responsible for any costs of the surgery or any care needed because of complications arising from their incorrect instructions to fast your rabbit. You can also file a complaint with the AVMA about this vet giving incorrect and dangerous pre surgical instruction that ultimately caused your rabbits death. What they did could amount to medical malpractice, or in the very least negligence. Be firm, be insistent. If they did give you instructions to fast your rabbit prior to surgery, they need to be held accountable for their mistake.
https://rabbit.org/gastrointestinal-stasis-the-silent-killer-2/
https://rabbit.org/pre-surgical-car...d dogs, rabbits,helps them to recover quickly.
https://www.avma.org/resources/pet-owners/yourvet/complaints-against-veterinarians
