A harness for a quadruped animal including a chest strap which in use of the harness lies across the chest of the animal in front of the forelegs, the harness including an attachment for a leading strap, the attachment being slidably mounted on the chest strap for movement therealong. Each end of the chest strap is attached to a trunk loop which in use of the harness passes around the trunk of the animal behind the forelegs. The trunk loop includes a back strap which in use of the harness lies across the back of the animal affixed to a lower strap which in use of the harness passes under the animal behind the forelegs.