I don't know the dilution for concentrated Pyrethrin so it is best to buy it already prepared.


Buy a can of PAM (provent-a-mite or you can get a can of Equte lice spray from Wal-Mart) which is designed for snakes but will work just as well and effectively on rat mites.


It is a fairly simple process - empty the cages and clean them out, treat with PAM according to directions (very quick short bursts), allow to dry, replace bedding and treat the bedding with PAM (again quick short burts) all to dry. Replace rats.

Long term is to buy a pyrethrin sprayer for your rat room which will keep this from ever happening again. (PM me if interested in more details)

Once you have treated them you need to figure out how you got them...did you bring in an outside rat that was infested and not quarantined?