Many years ago I had a cat that would walk on a leash. The first thing I did to train it to walk was put a harness on my cat with the leash attached and let it wear in around the house. At first, he hated it but in just a few days accepted the leash. Then we walked around inside the house. After a few days of that we started going outside and walked around the yard. Before long we were walking around the neighborhood. It always attracted a lot of attention from both adults and children. He got to a point where he really enjoyed his walks and would jump up in my lap if I picked up the leash.