Since we live near a busy road, where motorists floor it through the countryside, we decided we'd rather have our rescue-cat than a flat feline pancake. So we have opted for a Cat Leash.
Day #1: A casual promenade on the patio. (Spring peepers in the background. Wait ... I think I heard something rustle in the preserve. Bobcats have been back there lately.)
I know, I know ... the whole essence of Truman's lioness has now been de-mystified. But at least we've reined in the situation. In a boss red/cranberry bungee leash. Sharrrrp.