Find old t-shirts or fabric. Cut the fabric into 20 pieces that measure approx 1 inch x 20 inch (2.5cm x 50cm) for a large dog. For smaller dogs reduce the length and quantity but not the 1 inch width. Lay your pieces together in 2 sections of 10. Twist the 2 sections together and tie a large knot at each end as shown in the picture. Your knot should be tight and secure.