Cat Harnesses: Best Cat Harnesses for Walking | Petco Cat harnesses are perfect for pets who enjoy some fresh air! Shop Petco for the best cat walking harnesses to let your feline safely explore the outdoors. Amazon: pet harness cat Small Dog Harness Cat Harness Escape Proof Cat and Dog Harness Adjustable Vest Harnesses with Reflective Strap Soft Mesh Back Metal Clip No Pull No Choke Training Walk for Small Pet Puppy Kitten. 4.1 out of 5 stars 28. $13 $ 13. 99 $15 $ 15. 99. Get it as soon as Fri, Apr 5.