Rodents are especially diffcult.
If you have many different kinds of rodents remember that the vet you bring your ferret to may not be the appropriate vet for your mouse. Always check the vets references and ask plenty of questions. Ask people with the same kind of pet where they take them and if they are satisified with the service. Spend some time researching your pet and ask the vet these questions. Since you already know the answers you can double check on the vets knowledge.