My daughter and I had ones that were just bracelets with a retractable cord between. She could get up to around four feet from me. We did a lot of hiking since she could walk, and I can’t imagine going through some places without it. She’s so quick and always loved to peer right over cliff sides. No fear!
He is at risk of being injured or killed by a car, predatory animals, crazy people, etc. not to mention the damage that he and his friends are doing to the small wildlife in the area… Bringing friendly, adoptable strays to a shelter is the right thing to do.