Bernese Mountain Dogs are strong, heavy animals, and their walking equipment needs to reflect that reality. A standard flat collar in nylon or leather is appropriate for holding identification tags and for casual use around the home, but most Bernese owners find that a well-fitted harness provides far better control and comfort during walks. Collars alone can place excessive pressure on the trachea when a large dog pulls, which can cause coughing, gagging, or long-term airway damage.
Front-clip harnesses are the most popular choice for Bernese Mountain Dogs that pull on leash. The front attachment point redirects the dog's forward momentum to the side, naturally discouraging pulling without the need for correction-based tools. Back-clip harnesses are more comfortable for dogs that already walk politely but can actually encourage pulling in dogs that have not been leash trained, since the chest strap gives them something to lean into.
Harness fit is critical and often overlooked. A harness that is too loose will shift and chafe, while one that is too tight restricts shoulder movement and can cause skin irritation beneath the dense coat. Measure your dog's girth at the widest point of the chest and consult the manufacturer's sizing chart carefully. Many harnesses designed for large breeds offer multiple adjustment points at the chest, belly, and shoulders to achieve a customized fit.
Leashes for a Bernese should be sturdy — six feet of heavy-duty nylon or leather webbing is the standard recommendation. Retractable leashes are generally not advisable for dogs of this size because the thin cord can snap under the force of a sudden lunge, and the braking mechanism may not reliably stop a 100-pound dog at speed. A fixed-length leash provides predictable control and keeps the dog at a manageable distance in public spaces.