I do know that already-sick and old rats often can't stand parasitic bugs. They make a bad problem already worse, as they deplete blood supply. :\ I'm sorry for your loss.
I'd find a new vet if I were you... A vet treating rodents should know what to treat them with if they have lites/mites.
Revolution or Ivomec can be used. Revolution would need a prescription, while Ivomec can be bought at stores that carry horse supplies.
I'd still recommend a vet visit.
By the way... It's may not be mites. You can't see most varieties of mites, whereas lice, you can see.
I'd find a new vet if I were you... A vet treating rodents should know what to treat them with if they have lites/mites.
Revolution or Ivomec can be used. Revolution would need a prescription, while Ivomec can be bought at stores that carry horse supplies.
I'd still recommend a vet visit.
By the way... It's may not be mites. You can't see most varieties of mites, whereas lice, you can see.