Every Tonkinese cat should wear a breakaway collar with an identification tag, even if the cat lives exclusively indoors. Breakaway collars are designed with a clasp that releases under pressure, preventing strangulation if the collar catches on furniture, branches, or fencing. A collar that does not have a breakaway mechanism is a serious safety hazard for any cat and should not be used under any circumstances.
For Tonkinese cats that enjoy supervised outdoor time or walks, a harness is far safer and more effective than a collar and leash combination. Cats can slip out of collars with alarming ease, but a well-fitted harness that wraps around the chest and shoulders distributes pressure safely and provides secure control. Look for an H-style or vest-style harness with adjustable straps at the neck and chest. The harness should be snug enough that you cannot pull it over the cat's head but loose enough to slide two fingers beneath any strap.
Leash training a Tonkinese is more feasible than with many breeds because of their sociable and adventurous nature. Start indoors, allowing the cat to wear the harness for short periods before attaching a lightweight leash. Let the cat lead during early outdoor sessions rather than directing it — the goal is to build confidence and positive associations, not to walk the cat like a dog. A four-to-six-foot leash gives enough freedom to explore without losing control.
Retractable leashes are not recommended for cats. The sudden tension from a locked retractable leash can startle a cat into a panic response, and the thin cord can wrap around limbs or objects. A standard flat or round leash made from lightweight nylon or cotton provides consistent, predictable control.