You must only ever use products on pet species that they have been specifically developed and licensed for. FRONTLINE PLUS^® for Cats can only be used on cats and ferrets; FRONTLINE PLUS^® for Dogs can only be used on dogs; FRONTLINE^® SPOT ON for Cats can only be used on cats; FRONTLINE^® SPOT ON for Dogs can only be used on dogs and FRONTLINE TRI-ACT^® can only be used on dogs. Do not use any FRONTLINE^® treatment on rabbits.