I have concluded my investigation and found that ben lives in a box, not a cage.
Since he may pass his herpes on to otherwise pure, unsuspecting super-cute fuzzy bunnies, he needs to be consigned to a escape-proof cage.
Someone please step up and purchase the cage on Ceara's wish list to solve this menace to leporid health once and for all.
For the record and appropriate tracking, I have reported ben's overt racism to the FDL [Feline Defamation League].