I live in ,Toronto Canada, just asking. What cost are you dealing with, in other parts? Here, quick visit to the vet will set will set you back $100.00. want a male neutered, $300., medicine for an URI, with exam, lab costs, $200. An abscess, $300....the vets, who have knowledge, with rodents, treat they as special exotic animals, and since there is not a lot of them, you pay the price, can get costly,,especially when the little rat may be free. They ,, (rats) need to be looked after, if you question the vet, they, just ask, Where , and who else is there? Caught in a trap, looking after our pets.