Efficacy of CLiK Spray-On in Preventing Naturally Occuring Blowfly Strike When Applied to Unmulesed Sheep

Field studies were conducted in Australia to determine the efficacy of CLiK® Spray-On (50 g/L dicyclanil) in protecting unmulesed sheep from naturally occurring blowfly strike. Unmulesed sheep were treated on day 0 and inspected for flystrike at defined intervals thereafter. Any strikes detected were documented and resolved with a flystrike dressing. In the interest of animal welfare, untreated control groups were not maintained and blowfly pressure was determined by fly traps. Efficacy was calculated by determining the percentage cumulative strike rate at each site. In all, seven strikes were detected in 3028 CLiK-treated, unmulesed sheep. Six of these strikes were on the breech. Under conditions of moderate to high fly pressure, CLiK Spray-On protected unmulesed Merino and cross-breed sheep of various ages and wool lengths for the Australian registered protection period of 18-24 weeks, which had been previously determined using only mulesed animals.