An assembly and method for moving decoys is disclosed. The assembly includes one or more components for horizontally moving decoys floating on water, such that the decoys appear to be swimming. In addition, the device includes one or more component for rotating decoys, such that the decoys appear to be changing direction while swimming. For example, the assembly may include at least two posts connected by one or more slide rails. Each post includes a rotation initiation bar and a series of timing pins to engage a decoy carrier, which slides between the posts along the one or more slide rails. The decoy carrier is connected to pull lines, which are wound about a rotatable reel or spool.