That's the sad thing, vets aren't usually willing to check or look for you...even the ones that ARE exotics or see them regularly (least here). If it does not go away in a day or two, or gets worse (scabbing appears worse, on nose, paws, mouth area, ears, or you see does that have similar markings on them) then IF it was me, I'd assume vent and treat as such. If it came back, then it could be some thing worse and would seek out a vet. It will take a while, even after it clears up do not breed for 30 days so that if is still present hopefully it will show itself. It doesn't always work and can hide. Cages, feeders, any thing they can come into contact with needs to be cleaned and cleaned well. Use wooden toys or nest boxes? Trash/burn them, they are next to impossible to disinfect completely. IF you already have an established vet and good relationship, then you may be able to skip the whole treatment and have the scrapping done if you can afford to. Like akane and the others said, some times you just have to try and work with what you have versus a more expensive method that may or may not even give you good/correct results to boot.