This blinded , multi-center study in client-owned dogs evaluated the flea control provided by a single oral fluralaner treatment ( @-@mg / kg ; Bravecto , Merck Animal Health ) compared to a control group administered three oral spinosad ( @ - @mg/kg ; Comfortis , Elanco ) treatments at @-week intervals together with an amitraz collar ( @ % , Preventic , Virbac ) .