Hmmn, I didn't know that! I don't think you need to worry about treating them against fleas, though. Wouldn't they eat fleas...? (Just a crazy guess since they like bugs!)
I definitely wouldn't advise purchasing any kind of flea prevention like you would for other pets. If they do wind up getting them somehow, you'd definitely want to contact your vet ASAP instead of home treating.
It has been suggested to put a drop of revolution behind the neck to treat parasites. Problem is that they can easily groom there and their cage mates can and will certainly groom there on each other. So if treating that way it is best to quarantine the treated animal for a day or two to let the chemicals do their OobieDoobyScoobyDooBadooby magic.