For Shih Tzu dogs, the most important consideration in a harness is the fit and comfort around the chest and neck, as this breed is prone to respiratory issues and tracheal collapse. A well-designed harness distributes pressure evenly, avoiding strain on the delicate trachea. Our editorial team compared top harnesses to find options that offer secure fit, easy on/off, and gentle support for your Shih Tzu’s unique body shape.