K-9 Favorite terminator spray (Fipronil) provides fast long-lasting, effective treatment and control of mosquitoes, fleas and ticks on your pet. It helps to control paralysis tick, brown dog tick, as well as biting lice. Strong enough to break the life cycle of these persistent parasites. It kills up to 100% of existing fleas & ticks in less than 24 hours. It continues killing for 3 month or more. K-9 terminator spray can be applied to both adult dogs and puppies 8 weeks or older once a month. For external use only.