4) Make Chase's pup tag
To make the Pup Tag, tint a small ball of white fondant with a dot of black icing color to make grey, then roll out and freehand cut a 2 in. shield shape and 1 in.-long rectangle to attach to the cake "collar." Knead and roll out a ball of blue fondant, then freehand cut a shield shape slightly smaller than the grey one you just made. Knead and roll out yellow fondant, then cut out a star shape with the smallest star cookie cutter. Assemble the Pup Tag with dots of buttercream icing, layering the star on top of the blue shield on top of the grey shield. When it's dry, attach the Pup Tag to the top tier of the cake with buttercream icing.