Walking a potbellied pig on a leash is a practical necessity for veterinary visits, travel, and supervised outdoor time in unfenced areas, but it requires specialized equipment that accounts for pig anatomy. Collars are completely unsuitable for pigs. A pig's neck is wider than its head, which means any collar tight enough to stay on will restrict breathing, and any collar loose enough to be comfortable will slide right off. A properly fitted harness is the only safe option for leash walking a potbellied pig.
The ideal pig harness wraps around the chest and behind the front legs rather than around the neck and shoulders. Step-in harnesses or H-style harnesses designed for deep-chested dogs can work for smaller potbellied pigs, but larger individuals often require harnesses specifically designed for pigs or goats. The fit should be snug enough that the pig cannot back out of it but loose enough to allow a flat hand between the harness and the pig's body. Check the fit regularly, as pigs can gain weight quickly and outgrow a harness that fit perfectly a month ago.
Leash material and length matter for control and safety. A sturdy nylon or biothane leash four to six feet long provides adequate control without being so long that the pig can build momentum. Retractable leashes are dangerous with pigs because the thin cord can cause friction burns and the braking mechanism is often inadequate for an animal that can weigh over 150 pounds and has a low center of gravity. A fixed-length leash attached to a well-fitted harness gives you the most control.
Harness training should begin as early as possible, ideally during the piglet stage. Most pigs initially resist harnesses and will scream, roll, and attempt to back out. Introduce the harness gradually by leaving it near the pig's food, then draping it over the pig during calm moments, and eventually buckling it loosely for short periods with treat rewards. Patience during this training phase pays enormous dividends, as a pig comfortable in its harness is exponentially easier to handle in veterinary, travel, and emergency situations.