I am not a fan of people walking their cats on a leash (only saw it once) and would not do it. When I saw it the man was walking his cat along a crowded city street during rush hour. All I could think of was how unfair that it to the cat, and even the pedestrians, because everyone had to stay out of the way of the cat and the kitty had to dodge the walkers. In addition to that obvious risk of the cat being stepped on I think there are a myriad of other safety concerns. What if a dog or even squirrel is around and becomes agitated by the cat and attacks it? A big concern was the cat's paws on the sidewalk, I do not think cats have the type of paws that can withstand significant heat or rough surfaces. At the end of the day I think there are other ways to entertain your cat and exercise it.