A harness can be a useful addition to a dog collar for a number of reasons.
Safety: Eliminate pressure from your dog's neck, avoiding potential trachea and neck injury.
Training: Teach your dog not to pull is easier as the pressure from a harness is more evenly distributed around your dog’s body.
Security: Some dogs can manage to slip their heads out of their collar and escape, but this is much less likely to happen with a harness.
Legal: It is an offence to have your dog unsecured in a vehicle in NSW and other states, and a harness will enable you to comply with th elaw and avoid hefty fines.