Choose a rubber sink mat with large holes, approximately 12x18 inches for medium dogs. Ensure holes are big enough to thread fleece strips but small enough to hold them securely.

Cut polar fleece into strips measuring 1.5 inches wide by 8 inches long. Use multiple colors for visual stimulation.

Thread each fleece strip through adjacent holes, then tie a double knot underneath the mat. Pull knots tight against the rubber base.

Fill every hole with fleece strips to create a dense foraging surface.

Begin introduction by placing high-value treats on top of fleece strips, not buried within, to build positive associations.

Gradually hide treats deeper within fleece layers over several training sessions.

Scatter treats throughout different depths and sections, avoiding predictable placement patterns.

Use small training treats or break larger treats into pea-sized pieces to prevent quick consumption.

Supervise initial sessions to ensure proper sniffing behavior rather than flipping or shaking the mat.

Clean weekly in cold water with mild detergent and air dry completely before next use.