Some people prefer a collar and some a harness. We believe there is a use for both depending on the dog and what your activities are. For all pulling activities, you should always use a harness. The same is true for small dog breeds, which are delicate and where a collar could damage their necks. Breeds with short muzzles also benefit from harnesses because of their predisposition to breathing complications and tracheal collapse. Then there are older dogs that have trouble walking stairs or getting up. Here is an EQDOG Harness the perfect choice.