wont vanilla get them drunk i know it will if a human drinks it.

just thought of another way get an air purifier or put a lil bit of activated carbon under bedding or on top of cage (will work best if you can have air pushing threw the carbon

would have to make some kind of hood that covers what the mice are in then use an in-line duct fan to draw the air threw the activated carbon no smell for quite some time would have to still clean cages like usual but no smell until the filter is used up or the fan goes off maybe even build a rack with built in air filtration so only time you get a smell is when rack is opened up or filter gets mostly used up