Training collars such as Herm Sprenger prong collar 2.25  are a common tool used by dog owners to break unwanted behaviors. Some produce sounds or vibrations to deter your dog from engaging in wrongdoing. Others are made to cause resistance when your dog behaves in a particular way. To stop a behavior, some people utilize electric or static shocks. Training collars are not magic cures, and they won't function without your perseverance and commitment to a regular training schedule. Yet if you get stuck, they can be of great assistance.