6 MONTH OFF-SHEARS GUARANTEE*
Elanco guarantees that when Viper is applied according to the label directions to sheep off-shears, there will be no detectable lice present on sheep six months after treatment.*
To qualify, simply register your purchase within 14 days of application and apply Viper in accordance with the label directions.
Viper is a low odour, water-based formulation that is easy to apply with the recommended applicator and clean up after use.
Viper provides effective lice control when applied off-shears. Extensive research and commercial experience have confirmed lice will not re-infect sheep for 4 weeks after application off-shears when Viper is applied within 24 hours of shearing.
Viper continues to kill adult lice and emerging nymphs that hatch from eggs to four weeks after treatment when applied within 24 hours of shearing.