How can I safely set up a trolley cable run for dogs in my backyard?

To safely set up a trolley cable run for dogs in your backyard, you will need a sturdy cable, a trolley system, and secure anchor points. Make sure the cable is high enough to prevent tangling and inspect it regularly for wear and tear. Attach the trolley system to the cable and your dog's harness, allowing them to move freely within a designated area. Always supervise your dog while they are on the trolley run to ensure their safety.