Line a baking sheet with parchment paper and set it aside.
Place the white chocolate melting wafers in a microwave-safe bowl. Heat in 30-second intervals, stirring after each, until fully melted and smooth.
Dip each pretzel rod into the melted white chocolate, leaving about one inch uncovered at one end. Let excess chocolate drip off, then lay the coated pretzel on the prepared baking sheet.
Melt the dark chocolate melting wafers in a separate bowl using the same microwave method. Spoon the melted dark chocolate into a piping bag or zip-top bag with a small corner cut off.
Pipe small lines and dots on the white chocolate coating to create simple bone shapes at both ends of each pretzel. Let the chocolate set at room temperature until firm.