Zenify Double Dog Lead Dual Two Way Tangle Free Coupler Split Bungee Leash for Walking Multiple Pet 2 Dogs Puppies (Black Medium) (Black Medium Coupler with Lead)
Zenify Pets
TUG 360° Tangle-Free Retractable Dog Lead for Up to 25 kg Dogs | 5 m Strong Nylon Tape | One-Handed Brake, Pause, Lock (Medium, White)
TUG
Pets Dog Lead, Retractable Dog Lead 360° Tangle-Free, Training Slipknot Leash for Walking, Holds Up to 50kg
Hiumotan
The Other End of the Leash: Why We Do What We Do Around Dogs
Ballantine Books